Home / 21,287.08-29,376.17-12,339.79

Finding the Fourth Proportional to 21,287.08, 29,376.17 and 12,339.79

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Solution

The fourth proportional to 21,287.08, 29,376.17 and 12,339.79 is: 17,028.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.08 : 29,376.17 = 12,339.79 : x
  2. Step 2: Convert to fraction form
    21,287.08/29,376.17 = 12,339.79/x
  3. Step 3: Cross multiply
    21,287.08x = 29,376.17 × 12,339.79
  4. Step 4: Simplify right side
    21,287.08x = 362,495,726.21
  5. Step 5: Solve for x
    x = 362,495,726.21/21,287.08
  6. Step 6: Final answer
    x = 17,028.91

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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.