Home / 20,657.31-28,507.40-11,225.88

Finding the Fourth Proportional to 20,657.31, 28,507.40 and 11,225.88

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Solution

The fourth proportional to 20,657.31, 28,507.40 and 11,225.88 is: 15,491.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.31 : 28,507.40 = 11,225.88 : x
  2. Step 2: Convert to fraction form
    20,657.31/28,507.40 = 11,225.88/x
  3. Step 3: Cross multiply
    20,657.31x = 28,507.40 × 11,225.88
  4. Step 4: Simplify right side
    20,657.31x = 320,020,595.38
  5. Step 5: Solve for x
    x = 320,020,595.38/20,657.31
  6. Step 6: Final answer
    x = 15,491.88

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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.