Home / 21,645.28-29,870.95-11,954.71

Finding the Fourth Proportional to 21,645.28, 29,870.95 and 11,954.71

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Solution

The fourth proportional to 21,645.28, 29,870.95 and 11,954.71 is: 16,497.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,645.28 : 29,870.95 = 11,954.71 : x
  2. Step 2: Convert to fraction form
    21,645.28/29,870.95 = 11,954.71/x
  3. Step 3: Cross multiply
    21,645.28x = 29,870.95 × 11,954.71
  4. Step 4: Simplify right side
    21,645.28x = 357,098,544.67
  5. Step 5: Solve for x
    x = 357,098,544.67/21,645.28
  6. Step 6: Final answer
    x = 16,497.76

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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.