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Finding the Fourth Proportional to 8,715.61, 13,079.13 and 5,203

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Solution

The fourth proportional to 8,715.61, 13,079.13 and 5,203 is: 7,807.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,715.61 : 13,079.13 = 5,203 : x
  2. Step 2: Convert to fraction form
    8,715.61/13,079.13 = 5,203/x
  3. Step 3: Cross multiply
    8,715.61x = 13,079.13 × 5,203
  4. Step 4: Simplify right side
    8,715.61x = 68,050,713.39
  5. Step 5: Solve for x
    x = 68,050,713.39/8,715.61
  6. Step 6: Final answer
    x = 7,807.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.