Home / 20,712.15-31,068.50-5,921.55

Finding the Fourth Proportional to 20,712.15, 31,068.50 and 5,921.55

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Solution

The fourth proportional to 20,712.15, 31,068.50 and 5,921.55 is: 8,882.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.15 : 31,068.50 = 5,921.55 : x
  2. Step 2: Convert to fraction form
    20,712.15/31,068.50 = 5,921.55/x
  3. Step 3: Cross multiply
    20,712.15x = 31,068.50 × 5,921.55
  4. Step 4: Simplify right side
    20,712.15x = 183,973,646.57
  5. Step 5: Solve for x
    x = 183,973,646.57/20,712.15
  6. Step 6: Final answer
    x = 8,882.40

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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.