Home / 21,491.16-29,655.15-12,540.84

Finding the Fourth Proportional to 21,491.16, 29,655.15 and 12,540.84

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Solution

The fourth proportional to 21,491.16, 29,655.15 and 12,540.84 is: 17,304.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,491.16 : 29,655.15 = 12,540.84 : x
  2. Step 2: Convert to fraction form
    21,491.16/29,655.15 = 12,540.84/x
  3. Step 3: Cross multiply
    21,491.16x = 29,655.15 × 12,540.84
  4. Step 4: Simplify right side
    21,491.16x = 371,900,491.33
  5. Step 5: Solve for x
    x = 371,900,491.33/21,491.16
  6. Step 6: Final answer
    x = 17,304.81

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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.