Home / 19,987.18-29,981.25-6,839.46

Finding the Fourth Proportional to 19,987.18, 29,981.25 and 6,839.46

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Solution

The fourth proportional to 19,987.18, 29,981.25 and 6,839.46 is: 10,259.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.18 : 29,981.25 = 6,839.46 : x
  2. Step 2: Convert to fraction form
    19,987.18/29,981.25 = 6,839.46/x
  3. Step 3: Cross multiply
    19,987.18x = 29,981.25 × 6,839.46
  4. Step 4: Simplify right side
    19,987.18x = 205,055,560.13
  5. Step 5: Solve for x
    x = 205,055,560.13/19,987.18
  6. Step 6: Final answer
    x = 10,259.35

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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.