Home / 21,140.38-29,185.68-14,435.74

Finding the Fourth Proportional to 21,140.38, 29,185.68 and 14,435.74

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Solution

The fourth proportional to 21,140.38, 29,185.68 and 14,435.74 is: 19,929.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.38 : 29,185.68 = 14,435.74 : x
  2. Step 2: Convert to fraction form
    21,140.38/29,185.68 = 14,435.74/x
  3. Step 3: Cross multiply
    21,140.38x = 29,185.68 × 14,435.74
  4. Step 4: Simplify right side
    21,140.38x = 421,316,888.20
  5. Step 5: Solve for x
    x = 421,316,888.20/21,140.38
  6. Step 6: Final answer
    x = 19,929.49

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Double scale
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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.