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Finding the Fourth Proportional to 20,711.64, 28,582.02 and 11,280.18

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Solution

The fourth proportional to 20,711.64, 28,582.02 and 11,280.18 is: 15,566.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.64 : 28,582.02 = 11,280.18 : x
  2. Step 2: Convert to fraction form
    20,711.64/28,582.02 = 11,280.18/x
  3. Step 3: Cross multiply
    20,711.64x = 28,582.02 × 11,280.18
  4. Step 4: Simplify right side
    20,711.64x = 322,410,330.36
  5. Step 5: Solve for x
    x = 322,410,330.36/20,711.64
  6. Step 6: Final answer
    x = 15,566.62

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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.