Home / 7,985.28-11,979.40-2,438

Finding the Fourth Proportional to 7,985.28, 11,979.40 and 2,438

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Solution

The fourth proportional to 7,985.28, 11,979.40 and 2,438 is: 3,657.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.28 : 11,979.40 = 2,438 : x
  2. Step 2: Convert to fraction form
    7,985.28/11,979.40 = 2,438/x
  3. Step 3: Cross multiply
    7,985.28x = 11,979.40 × 2,438
  4. Step 4: Simplify right side
    7,985.28x = 29,205,777.20
  5. Step 5: Solve for x
    x = 29,205,777.20/7,985.28
  6. Step 6: Final answer
    x = 3,657.45

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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.