Home / 20,587.56-30,881.28-7,439.92

Finding the Fourth Proportional to 20,587.56, 30,881.28 and 7,439.92

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Solution

The fourth proportional to 20,587.56, 30,881.28 and 7,439.92 is: 11,159.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.56 : 30,881.28 = 7,439.92 : x
  2. Step 2: Convert to fraction form
    20,587.56/30,881.28 = 7,439.92/x
  3. Step 3: Cross multiply
    20,587.56x = 30,881.28 × 7,439.92
  4. Step 4: Simplify right side
    20,587.56x = 229,754,252.70
  5. Step 5: Solve for x
    x = 229,754,252.70/20,587.56
  6. Step 6: Final answer
    x = 11,159.86

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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.