Home / 20,711.52-28,581.93-11,280.12

Finding the Fourth Proportional to 20,711.52, 28,581.93 and 11,280.12

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Solution

The fourth proportional to 20,711.52, 28,581.93 and 11,280.12 is: 15,566.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.52 : 28,581.93 = 11,280.12 : x
  2. Step 2: Convert to fraction form
    20,711.52/28,581.93 = 11,280.12/x
  3. Step 3: Cross multiply
    20,711.52x = 28,581.93 × 11,280.12
  4. Step 4: Simplify right side
    20,711.52x = 322,407,600.23
  5. Step 5: Solve for x
    x = 322,407,600.23/20,711.52
  6. Step 6: Final answer
    x = 15,566.58

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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.