Home / 21,391.11-32,069.34-8,920.47

Finding the Fourth Proportional to 21,391.11, 32,069.34 and 8,920.47

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Solution

The fourth proportional to 21,391.11, 32,069.34 and 8,920.47 is: 13,373.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.11 : 32,069.34 = 8,920.47 : x
  2. Step 2: Convert to fraction form
    21,391.11/32,069.34 = 8,920.47/x
  3. Step 3: Cross multiply
    21,391.11x = 32,069.34 × 8,920.47
  4. Step 4: Simplify right side
    21,391.11x = 286,073,585.39
  5. Step 5: Solve for x
    x = 286,073,585.39/21,391.11
  6. Step 6: Final answer
    x = 13,373.48

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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.