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Finding the Fourth Proportional to 8,459.60, 12,689.85 and 3,529.74

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Solution

The fourth proportional to 8,459.60, 12,689.85 and 3,529.74 is: 5,294.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,459.60 : 12,689.85 = 3,529.74 : x
  2. Step 2: Convert to fraction form
    8,459.60/12,689.85 = 3,529.74/x
  3. Step 3: Cross multiply
    8,459.60x = 12,689.85 × 3,529.74
  4. Step 4: Simplify right side
    8,459.60x = 44,791,871.14
  5. Step 5: Solve for x
    x = 44,791,871.14/8,459.60
  6. Step 6: Final answer
    x = 5,294.80

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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.