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Finding the Fourth Proportional to 21,901.88, 32,876.20 and 9,428.08

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Solution

The fourth proportional to 21,901.88, 32,876.20 and 9,428.08 is: 14,152.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,901.88 : 32,876.20 = 9,428.08 : x
  2. Step 2: Convert to fraction form
    21,901.88/32,876.20 = 9,428.08/x
  3. Step 3: Cross multiply
    21,901.88x = 32,876.20 × 9,428.08
  4. Step 4: Simplify right side
    21,901.88x = 309,959,443.70
  5. Step 5: Solve for x
    x = 309,959,443.70/21,901.88
  6. Step 6: Final answer
    x = 14,152.18

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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.