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Finding the Fourth Proportional to 9,708.80, 14,530.80 and 8,542.40

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Solution

The fourth proportional to 9,708.80, 14,530.80 and 8,542.40 is: 12,785.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,708.80 : 14,530.80 = 8,542.40 : x
  2. Step 2: Convert to fraction form
    9,708.80/14,530.80 = 8,542.40/x
  3. Step 3: Cross multiply
    9,708.80x = 14,530.80 × 8,542.40
  4. Step 4: Simplify right side
    9,708.80x = 124,127,905.92
  5. Step 5: Solve for x
    x = 124,127,905.92/9,708.80
  6. Step 6: Final answer
    x = 12,785.09

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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.