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Finding the Fourth Proportional to 8,611.29, 12,916.95 and 4,713.57

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Solution

The fourth proportional to 8,611.29, 12,916.95 and 4,713.57 is: 7,070.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.29 : 12,916.95 = 4,713.57 : x
  2. Step 2: Convert to fraction form
    8,611.29/12,916.95 = 4,713.57/x
  3. Step 3: Cross multiply
    8,611.29x = 12,916.95 × 4,713.57
  4. Step 4: Simplify right side
    8,611.29x = 60,884,948.01
  5. Step 5: Solve for x
    x = 60,884,948.01/8,611.29
  6. Step 6: Final answer
    x = 7,070.36

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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.