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Finding the Fourth Proportional to 8,358.60, 12,537.90 and 3,426.60

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Solution

The fourth proportional to 8,358.60, 12,537.90 and 3,426.60 is: 5,139.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,358.60 : 12,537.90 = 3,426.60 : x
  2. Step 2: Convert to fraction form
    8,358.60/12,537.90 = 3,426.60/x
  3. Step 3: Cross multiply
    8,358.60x = 12,537.90 × 3,426.60
  4. Step 4: Simplify right side
    8,358.60x = 42,962,368.14
  5. Step 5: Solve for x
    x = 42,962,368.14/8,358.60
  6. Step 6: Final answer
    x = 5,139.90

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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.