Home / 20,938.16-31,402.44-12,507.04

Finding the Fourth Proportional to 20,938.16, 31,402.44 and 12,507.04

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Solution

The fourth proportional to 20,938.16, 31,402.44 and 12,507.04 is: 18,757.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.16 : 31,402.44 = 12,507.04 : x
  2. Step 2: Convert to fraction form
    20,938.16/31,402.44 = 12,507.04/x
  3. Step 3: Cross multiply
    20,938.16x = 31,402.44 × 12,507.04
  4. Step 4: Simplify right side
    20,938.16x = 392,751,573.18
  5. Step 5: Solve for x
    x = 392,751,573.18/20,938.16
  6. Step 6: Final answer
    x = 18,757.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.