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Finding the Fourth Proportional to 15,008.76, 20,707.02 and 8,715.96

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Solution

The fourth proportional to 15,008.76, 20,707.02 and 8,715.96 is: 12,025.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,008.76 : 20,707.02 = 8,715.96 : x
  2. Step 2: Convert to fraction form
    15,008.76/20,707.02 = 8,715.96/x
  3. Step 3: Cross multiply
    15,008.76x = 20,707.02 × 8,715.96
  4. Step 4: Simplify right side
    15,008.76x = 180,481,558.04
  5. Step 5: Solve for x
    x = 180,481,558.04/15,008.76
  6. Step 6: Final answer
    x = 12,025.08

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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.