Home / 20,711.04-28,580.76-11,279.40

Finding the Fourth Proportional to 20,711.04, 28,580.76 and 11,279.40

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Solution

The fourth proportional to 20,711.04, 28,580.76 and 11,279.40 is: 15,565.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.04 : 28,580.76 = 11,279.40 : x
  2. Step 2: Convert to fraction form
    20,711.04/28,580.76 = 11,279.40/x
  3. Step 3: Cross multiply
    20,711.04x = 28,580.76 × 11,279.40
  4. Step 4: Simplify right side
    20,711.04x = 322,373,824.34
  5. Step 5: Solve for x
    x = 322,373,824.34/20,711.04
  6. Step 6: Final answer
    x = 15,565.31

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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.