Home / 21,240.72-29,301.14-12,738.75

Finding the Fourth Proportional to 21,240.72, 29,301.14 and 12,738.75

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Solution

The fourth proportional to 21,240.72, 29,301.14 and 12,738.75 is: 17,572.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.72 : 29,301.14 = 12,738.75 : x
  2. Step 2: Convert to fraction form
    21,240.72/29,301.14 = 12,738.75/x
  3. Step 3: Cross multiply
    21,240.72x = 29,301.14 × 12,738.75
  4. Step 4: Simplify right side
    21,240.72x = 373,259,897.18
  5. Step 5: Solve for x
    x = 373,259,897.18/21,240.72
  6. Step 6: Final answer
    x = 17,572.85

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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.