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Finding the Fourth Proportional to 21,488.88, 32,257.08 and 12,740.88

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Solution

The fourth proportional to 21,488.88, 32,257.08 and 12,740.88 is: 19,125.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,488.88 : 32,257.08 = 12,740.88 : x
  2. Step 2: Convert to fraction form
    21,488.88/32,257.08 = 12,740.88/x
  3. Step 3: Cross multiply
    21,488.88x = 32,257.08 × 12,740.88
  4. Step 4: Simplify right side
    21,488.88x = 410,983,585.43
  5. Step 5: Solve for x
    x = 410,983,585.43/21,488.88
  6. Step 6: Final answer
    x = 19,125.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.