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Finding the Fourth Proportional to 8,476.74, 12,708.23 and 7,320.47

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Solution

The fourth proportional to 8,476.74, 12,708.23 and 7,320.47 is: 10,974.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,476.74 : 12,708.23 = 7,320.47 : x
  2. Step 2: Convert to fraction form
    8,476.74/12,708.23 = 7,320.47/x
  3. Step 3: Cross multiply
    8,476.74x = 12,708.23 × 7,320.47
  4. Step 4: Simplify right side
    8,476.74x = 93,030,116.32
  5. Step 5: Solve for x
    x = 93,030,116.32/8,476.74
  6. Step 6: Final answer
    x = 10,974.75

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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.