Home / 21,142.13-29,176.13-12,758.63

Finding the Fourth Proportional to 21,142.13, 29,176.13 and 12,758.63

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Solution

The fourth proportional to 21,142.13, 29,176.13 and 12,758.63 is: 17,606.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.13 : 29,176.13 = 12,758.63 : x
  2. Step 2: Convert to fraction form
    21,142.13/29,176.13 = 12,758.63/x
  3. Step 3: Cross multiply
    21,142.13x = 29,176.13 × 12,758.63
  4. Step 4: Simplify right side
    21,142.13x = 372,247,333.52
  5. Step 5: Solve for x
    x = 372,247,333.52/21,142.13
  6. Step 6: Final answer
    x = 17,606.90

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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.