Home / 21,654.48-29,903.82-20,475.10

Finding the Fourth Proportional to 21,654.48, 29,903.82 and 20,475.10

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Solution

The fourth proportional to 21,654.48, 29,903.82 and 20,475.10 is: 28,275.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,654.48 : 29,903.82 = 20,475.10 : x
  2. Step 2: Convert to fraction form
    21,654.48/29,903.82 = 20,475.10/x
  3. Step 3: Cross multiply
    21,654.48x = 29,903.82 × 20,475.10
  4. Step 4: Simplify right side
    21,654.48x = 612,283,704.88
  5. Step 5: Solve for x
    x = 612,283,704.88/21,654.48
  6. Step 6: Final answer
    x = 28,275.15

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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.