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Finding the Fourth Proportional to 15,008.13, 20,711.03 and 8,293.64

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Solution

The fourth proportional to 15,008.13, 20,711.03 and 8,293.64 is: 11,445.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,008.13 : 20,711.03 = 8,293.64 : x
  2. Step 2: Convert to fraction form
    15,008.13/20,711.03 = 8,293.64/x
  3. Step 3: Cross multiply
    15,008.13x = 20,711.03 × 8,293.64
  4. Step 4: Simplify right side
    15,008.13x = 171,769,681.83
  5. Step 5: Solve for x
    x = 171,769,681.83/15,008.13
  6. Step 6: Final answer
    x = 11,445.11

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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.