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Finding the Fourth Proportional to 8,957.79, 13,416.89 and 5,615.15

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Solution

The fourth proportional to 8,957.79, 13,416.89 and 5,615.15 is: 8,410.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,957.79 : 13,416.89 = 5,615.15 : x
  2. Step 2: Convert to fraction form
    8,957.79/13,416.89 = 5,615.15/x
  3. Step 3: Cross multiply
    8,957.79x = 13,416.89 × 5,615.15
  4. Step 4: Simplify right side
    8,957.79x = 75,337,754.72
  5. Step 5: Solve for x
    x = 75,337,754.72/8,957.79
  6. Step 6: Final answer
    x = 8,410.31

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1.5x scale

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.