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Finding the Fourth Proportional to 15,007.80, 20,711.70 and 8,293.08

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Solution

The fourth proportional to 15,007.80, 20,711.70 and 8,293.08 is: 11,444.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,007.80 : 20,711.70 = 8,293.08 : x
  2. Step 2: Convert to fraction form
    15,007.80/20,711.70 = 8,293.08/x
  3. Step 3: Cross multiply
    15,007.80x = 20,711.70 × 8,293.08
  4. Step 4: Simplify right side
    15,007.80x = 171,763,785.04
  5. Step 5: Solve for x
    x = 171,763,785.04/15,007.80
  6. Step 6: Final answer
    x = 11,444.97

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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.