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Finding the Fourth Proportional to 8,752.80, 13,124.40 and 2,906.40

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Solution

The fourth proportional to 8,752.80, 13,124.40 and 2,906.40 is: 4,358.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,752.80 : 13,124.40 = 2,906.40 : x
  2. Step 2: Convert to fraction form
    8,752.80/13,124.40 = 2,906.40/x
  3. Step 3: Cross multiply
    8,752.80x = 13,124.40 × 2,906.40
  4. Step 4: Simplify right side
    8,752.80x = 38,144,756.16
  5. Step 5: Solve for x
    x = 38,144,756.16/8,752.80
  6. Step 6: Final answer
    x = 4,358.01

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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.