Home / 20,657.42-28,507.10-11,225.98

Finding the Fourth Proportional to 20,657.42, 28,507.10 and 11,225.98

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Solution

The fourth proportional to 20,657.42, 28,507.10 and 11,225.98 is: 15,491.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.42 : 28,507.10 = 11,225.98 : x
  2. Step 2: Convert to fraction form
    20,657.42/28,507.10 = 11,225.98/x
  3. Step 3: Cross multiply
    20,657.42x = 28,507.10 × 11,225.98
  4. Step 4: Simplify right side
    20,657.42x = 320,020,134.46
  5. Step 5: Solve for x
    x = 320,020,134.46/20,657.42
  6. Step 6: Final answer
    x = 15,491.78

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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.