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Finding the Fourth Proportional to 8,615.49, 12,928.16 and 4,666.87

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Solution

The fourth proportional to 8,615.49, 12,928.16 and 4,666.87 is: 7,002.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.49 : 12,928.16 = 4,666.87 : x
  2. Step 2: Convert to fraction form
    8,615.49/12,928.16 = 4,666.87/x
  3. Step 3: Cross multiply
    8,615.49x = 12,928.16 × 4,666.87
  4. Step 4: Simplify right side
    8,615.49x = 60,334,042.06
  5. Step 5: Solve for x
    x = 60,334,042.06/8,615.49
  6. Step 6: Final answer
    x = 7,002.97

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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.