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Finding the Fourth Proportional to 15,991.88, 23,989.47 and 6,139.40

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Solution

The fourth proportional to 15,991.88, 23,989.47 and 6,139.40 is: 9,209.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,991.88 : 23,989.47 = 6,139.40 : x
  2. Step 2: Convert to fraction form
    15,991.88/23,989.47 = 6,139.40/x
  3. Step 3: Cross multiply
    15,991.88x = 23,989.47 × 6,139.40
  4. Step 4: Simplify right side
    15,991.88x = 147,280,952.12
  5. Step 5: Solve for x
    x = 147,280,952.12/15,991.88
  6. Step 6: Final answer
    x = 9,209.73

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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.