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Finding the Fourth Proportional to 8,658.45, 12,969.45 and 7,200.45

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Solution

The fourth proportional to 8,658.45, 12,969.45 and 7,200.45 is: 10,785.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.45 : 12,969.45 = 7,200.45 : x
  2. Step 2: Convert to fraction form
    8,658.45/12,969.45 = 7,200.45/x
  3. Step 3: Cross multiply
    8,658.45x = 12,969.45 × 7,200.45
  4. Step 4: Simplify right side
    8,658.45x = 93,385,876.25
  5. Step 5: Solve for x
    x = 93,385,876.25/8,658.45
  6. Step 6: Final answer
    x = 10,785.52

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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.