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Finding the Fourth Proportional to 21,411.70, 32,126.78 and 8,934.19

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Solution

The fourth proportional to 21,411.70, 32,126.78 and 8,934.19 is: 13,405.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,411.70 : 32,126.78 = 8,934.19 : x
  2. Step 2: Convert to fraction form
    21,411.70/32,126.78 = 8,934.19/x
  3. Step 3: Cross multiply
    21,411.70x = 32,126.78 × 8,934.19
  4. Step 4: Simplify right side
    21,411.70x = 287,026,756.61
  5. Step 5: Solve for x
    x = 287,026,756.61/21,411.70
  6. Step 6: Final answer
    x = 13,405.14

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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.