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Finding the Fourth Proportional to 21,938.88, 32,901.16 and 7,143.88

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Solution

The fourth proportional to 21,938.88, 32,901.16 and 7,143.88 is: 10,713.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,938.88 : 32,901.16 = 7,143.88 : x
  2. Step 2: Convert to fraction form
    21,938.88/32,901.16 = 7,143.88/x
  3. Step 3: Cross multiply
    21,938.88x = 32,901.16 × 7,143.88
  4. Step 4: Simplify right side
    21,938.88x = 235,041,938.90
  5. Step 5: Solve for x
    x = 235,041,938.90/21,938.88
  6. Step 6: Final answer
    x = 10,713.49

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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.