Home / 21,435.65-29,580.51-11,875.15

Finding the Fourth Proportional to 21,435.65, 29,580.51 and 11,875.15

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Solution

The fourth proportional to 21,435.65, 29,580.51 and 11,875.15 is: 16,387.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,435.65 : 29,580.51 = 11,875.15 : x
  2. Step 2: Convert to fraction form
    21,435.65/29,580.51 = 11,875.15/x
  3. Step 3: Cross multiply
    21,435.65x = 29,580.51 × 11,875.15
  4. Step 4: Simplify right side
    21,435.65x = 351,272,845.42
  5. Step 5: Solve for x
    x = 351,272,845.42/21,435.65
  6. Step 6: Final answer
    x = 16,387.32

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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.