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Finding the Fourth Proportional to 7,999.61, 12,001.28 and 2,453.76

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Solution

The fourth proportional to 7,999.61, 12,001.28 and 2,453.76 is: 3,681.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.61 : 12,001.28 = 2,453.76 : x
  2. Step 2: Convert to fraction form
    7,999.61/12,001.28 = 2,453.76/x
  3. Step 3: Cross multiply
    7,999.61x = 12,001.28 × 2,453.76
  4. Step 4: Simplify right side
    7,999.61x = 29,448,248.54
  5. Step 5: Solve for x
    x = 29,448,248.54/7,999.61
  6. Step 6: Final answer
    x = 3,681.21

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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.