Home / 8,130.69-11,220.57-4,985.07

Finding the Fourth Proportional to 8,130.69, 11,220.57 and 4,985.07

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Solution

The fourth proportional to 8,130.69, 11,220.57 and 4,985.07 is: 6,879.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,130.69 : 11,220.57 = 4,985.07 : x
  2. Step 2: Convert to fraction form
    8,130.69/11,220.57 = 4,985.07/x
  3. Step 3: Cross multiply
    8,130.69x = 11,220.57 × 4,985.07
  4. Step 4: Simplify right side
    8,130.69x = 55,935,326.89
  5. Step 5: Solve for x
    x = 55,935,326.89/8,130.69
  6. Step 6: Final answer
    x = 6,879.53

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Half scale
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Double scale
Find fourth proportional to 8,131.69, 11,221.95 and 4,986.07
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.