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Finding the Fourth Proportional to 8,575.36, 12,805.76 and 7,329.76

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Solution

The fourth proportional to 8,575.36, 12,805.76 and 7,329.76 is: 10,945.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,575.36 : 12,805.76 = 7,329.76 : x
  2. Step 2: Convert to fraction form
    8,575.36/12,805.76 = 7,329.76/x
  3. Step 3: Cross multiply
    8,575.36x = 12,805.76 × 7,329.76
  4. Step 4: Simplify right side
    8,575.36x = 93,863,147.42
  5. Step 5: Solve for x
    x = 93,863,147.42/8,575.36
  6. Step 6: Final answer
    x = 10,945.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.