Home / 12,445.60-17,173.38-8,421.22

Finding the Fourth Proportional to 12,445.60, 17,173.38 and 8,421.22

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Solution

The fourth proportional to 12,445.60, 17,173.38 and 8,421.22 is: 11,620.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,445.60 : 17,173.38 = 8,421.22 : x
  2. Step 2: Convert to fraction form
    12,445.60/17,173.38 = 8,421.22/x
  3. Step 3: Cross multiply
    12,445.60x = 17,173.38 × 8,421.22
  4. Step 4: Simplify right side
    12,445.60x = 144,620,811.12
  5. Step 5: Solve for x
    x = 144,620,811.12/12,445.60
  6. Step 6: Final answer
    x = 11,620.24

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Half scale
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Double scale
Find fourth proportional to 12,446.60, 17,174.76 and 8,422.22
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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.