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Finding the Fourth Proportional to 18,645.12, 25,731.12 and 11,573.76

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Solution

The fourth proportional to 18,645.12, 25,731.12 and 11,573.76 is: 15,972.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.12 : 25,731.12 = 11,573.76 : x
  2. Step 2: Convert to fraction form
    18,645.12/25,731.12 = 11,573.76/x
  3. Step 3: Cross multiply
    18,645.12x = 25,731.12 × 11,573.76
  4. Step 4: Simplify right side
    18,645.12x = 297,805,807.41
  5. Step 5: Solve for x
    x = 297,805,807.41/18,645.12
  6. Step 6: Final answer
    x = 15,972.32

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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.