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Finding the Fourth Proportional to 21,058.40, 29,060.40 and 11,627.20

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Solution

The fourth proportional to 21,058.40, 29,060.40 and 11,627.20 is: 16,045.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,058.40 : 29,060.40 = 11,627.20 : x
  2. Step 2: Convert to fraction form
    21,058.40/29,060.40 = 11,627.20/x
  3. Step 3: Cross multiply
    21,058.40x = 29,060.40 × 11,627.20
  4. Step 4: Simplify right side
    21,058.40x = 337,891,082.88
  5. Step 5: Solve for x
    x = 337,891,082.88/21,058.40
  6. Step 6: Final answer
    x = 16,045.43

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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.