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Finding the Fourth Proportional to 8,606.80, 12,910.20 and 5,688.40

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Solution

The fourth proportional to 8,606.80, 12,910.20 and 5,688.40 is: 8,532.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,606.80 : 12,910.20 = 5,688.40 : x
  2. Step 2: Convert to fraction form
    8,606.80/12,910.20 = 5,688.40/x
  3. Step 3: Cross multiply
    8,606.80x = 12,910.20 × 5,688.40
  4. Step 4: Simplify right side
    8,606.80x = 73,438,381.68
  5. Step 5: Solve for x
    x = 73,438,381.68/8,606.80
  6. Step 6: Final answer
    x = 8,532.60

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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.