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Finding the Fourth Proportional to 8,657.91, 12,913.94 and 7,254.99

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Solution

The fourth proportional to 8,657.91, 12,913.94 and 7,254.99 is: 10,821.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.91 : 12,913.94 = 7,254.99 : x
  2. Step 2: Convert to fraction form
    8,657.91/12,913.94 = 7,254.99/x
  3. Step 3: Cross multiply
    8,657.91x = 12,913.94 × 7,254.99
  4. Step 4: Simplify right side
    8,657.91x = 93,690,523.70
  5. Step 5: Solve for x
    x = 93,690,523.70/8,657.91
  6. Step 6: Final answer
    x = 10,821.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.