Home / 20,710.39-28,580.67-11,278.96

Finding the Fourth Proportional to 20,710.39, 28,580.67 and 11,278.96

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Solution

The fourth proportional to 20,710.39, 28,580.67 and 11,278.96 is: 15,565.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.39 : 28,580.67 = 11,278.96 : x
  2. Step 2: Convert to fraction form
    20,710.39/28,580.67 = 11,278.96/x
  3. Step 3: Cross multiply
    20,710.39x = 28,580.67 × 11,278.96
  4. Step 4: Simplify right side
    20,710.39x = 322,360,233.70
  5. Step 5: Solve for x
    x = 322,360,233.70/20,710.39
  6. Step 6: Final answer
    x = 15,565.15

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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.