Home / 15,217.11-21,003.11-9,902.70

Finding the Fourth Proportional to 15,217.11, 21,003.11 and 9,902.70

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Solution

The fourth proportional to 15,217.11, 21,003.11 and 9,902.70 is: 13,668.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,217.11 : 21,003.11 = 9,902.70 : x
  2. Step 2: Convert to fraction form
    15,217.11/21,003.11 = 9,902.70/x
  3. Step 3: Cross multiply
    15,217.11x = 21,003.11 × 9,902.70
  4. Step 4: Simplify right side
    15,217.11x = 207,987,497.40
  5. Step 5: Solve for x
    x = 207,987,497.40/15,217.11
  6. Step 6: Final answer
    x = 13,668.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.