Home / 21,320.76-31,981.14-10,925.88

Finding the Fourth Proportional to 21,320.76, 31,981.14 and 10,925.88

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Solution

The fourth proportional to 21,320.76, 31,981.14 and 10,925.88 is: 16,388.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.76 : 31,981.14 = 10,925.88 : x
  2. Step 2: Convert to fraction form
    21,320.76/31,981.14 = 10,925.88/x
  3. Step 3: Cross multiply
    21,320.76x = 31,981.14 × 10,925.88
  4. Step 4: Simplify right side
    21,320.76x = 349,422,097.90
  5. Step 5: Solve for x
    x = 349,422,097.90/21,320.76
  6. Step 6: Final answer
    x = 16,388.82

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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.