Home / 8,128.10-11,214.98-5,295.19

Finding the Fourth Proportional to 8,128.10, 11,214.98 and 5,295.19

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Solution

The fourth proportional to 8,128.10, 11,214.98 and 5,295.19 is: 7,306.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.10 : 11,214.98 = 5,295.19 : x
  2. Step 2: Convert to fraction form
    8,128.10/11,214.98 = 5,295.19/x
  3. Step 3: Cross multiply
    8,128.10x = 11,214.98 × 5,295.19
  4. Step 4: Simplify right side
    8,128.10x = 59,385,449.95
  5. Step 5: Solve for x
    x = 59,385,449.95/8,128.10
  6. Step 6: Final answer
    x = 7,306.19

Related Problems

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Half scale
Find fourth proportional to 16,256.20, 22,429.96 and 10,590.38
Double scale
Find fourth proportional to 8,129.10, 11,216.36 and 5,296.19
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.