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Finding the Fourth Proportional to 8,345.40, 12,522.95 and 3,151.68

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Solution

The fourth proportional to 8,345.40, 12,522.95 and 3,151.68 is: 4,729.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,345.40 : 12,522.95 = 3,151.68 : x
  2. Step 2: Convert to fraction form
    8,345.40/12,522.95 = 3,151.68/x
  3. Step 3: Cross multiply
    8,345.40x = 12,522.95 × 3,151.68
  4. Step 4: Simplify right side
    8,345.40x = 39,468,331.06
  5. Step 5: Solve for x
    x = 39,468,331.06/8,345.40
  6. Step 6: Final answer
    x = 4,729.35

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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.