Home / 31,428.72-43,372.80-18,851.04

Finding the Fourth Proportional to 31,428.72, 43,372.80 and 18,851.04

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Solution

The fourth proportional to 31,428.72, 43,372.80 and 18,851.04 is: 26,015.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,428.72 : 43,372.80 = 18,851.04 : x
  2. Step 2: Convert to fraction form
    31,428.72/43,372.80 = 18,851.04/x
  3. Step 3: Cross multiply
    31,428.72x = 43,372.80 × 18,851.04
  4. Step 4: Simplify right side
    31,428.72x = 817,622,387.71
  5. Step 5: Solve for x
    x = 817,622,387.71/31,428.72
  6. Step 6: Final answer
    x = 26,015.13

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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.