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Finding the Fourth Proportional to 21,034.76, 29,031.12 and 13,863.68

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Solution

The fourth proportional to 21,034.76, 29,031.12 and 13,863.68 is: 19,133.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,034.76 : 29,031.12 = 13,863.68 : x
  2. Step 2: Convert to fraction form
    21,034.76/29,031.12 = 13,863.68/x
  3. Step 3: Cross multiply
    21,034.76x = 29,031.12 × 13,863.68
  4. Step 4: Simplify right side
    21,034.76x = 402,478,157.72
  5. Step 5: Solve for x
    x = 402,478,157.72/21,034.76
  6. Step 6: Final answer
    x = 19,133.96

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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.