Home / 21,538.91-29,716.17-12,585.88

Finding the Fourth Proportional to 21,538.91, 29,716.17 and 12,585.88

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Solution

The fourth proportional to 21,538.91, 29,716.17 and 12,585.88 is: 17,364.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,538.91 : 29,716.17 = 12,585.88 : x
  2. Step 2: Convert to fraction form
    21,538.91/29,716.17 = 12,585.88/x
  3. Step 3: Cross multiply
    21,538.91x = 29,716.17 × 12,585.88
  4. Step 4: Simplify right side
    21,538.91x = 374,004,139.63
  5. Step 5: Solve for x
    x = 374,004,139.63/21,538.91
  6. Step 6: Final answer
    x = 17,364.11

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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.