Home / 31,402.53-43,345.89-20,655.30

Finding the Fourth Proportional to 31,402.53, 43,345.89 and 20,655.30

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Solution

The fourth proportional to 31,402.53, 43,345.89 and 20,655.30 is: 28,511.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,402.53 : 43,345.89 = 20,655.30 : x
  2. Step 2: Convert to fraction form
    31,402.53/43,345.89 = 20,655.30/x
  3. Step 3: Cross multiply
    31,402.53x = 43,345.89 × 20,655.30
  4. Step 4: Simplify right side
    31,402.53x = 895,322,361.72
  5. Step 5: Solve for x
    x = 895,322,361.72/31,402.53
  6. Step 6: Final answer
    x = 28,511.15

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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.