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Finding the Fourth Proportional to 8,358.71, 12,538.04 and 2,118.70

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Solution

The fourth proportional to 8,358.71, 12,538.04 and 2,118.70 is: 3,178.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,358.71 : 12,538.04 = 2,118.70 : x
  2. Step 2: Convert to fraction form
    8,358.71/12,538.04 = 2,118.70/x
  3. Step 3: Cross multiply
    8,358.71x = 12,538.04 × 2,118.70
  4. Step 4: Simplify right side
    8,358.71x = 26,564,350.43
  5. Step 5: Solve for x
    x = 26,564,350.43/8,358.71
  6. Step 6: Final answer
    x = 3,178.05

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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.