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Finding the Fourth Proportional to 8,720.71, 13,079.22 and 2,875.93

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Solution

The fourth proportional to 8,720.71, 13,079.22 and 2,875.93 is: 4,313.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.71 : 13,079.22 = 2,875.93 : x
  2. Step 2: Convert to fraction form
    8,720.71/13,079.22 = 2,875.93/x
  3. Step 3: Cross multiply
    8,720.71x = 13,079.22 × 2,875.93
  4. Step 4: Simplify right side
    8,720.71x = 37,614,921.17
  5. Step 5: Solve for x
    x = 37,614,921.17/8,720.71
  6. Step 6: Final answer
    x = 4,313.29

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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.