Home / 21,512.28-29,689.05-12,438.03

Finding the Fourth Proportional to 21,512.28, 29,689.05 and 12,438.03

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Solution

The fourth proportional to 21,512.28, 29,689.05 and 12,438.03 is: 17,165.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.28 : 29,689.05 = 12,438.03 : x
  2. Step 2: Convert to fraction form
    21,512.28/29,689.05 = 12,438.03/x
  3. Step 3: Cross multiply
    21,512.28x = 29,689.05 × 12,438.03
  4. Step 4: Simplify right side
    21,512.28x = 369,273,294.57
  5. Step 5: Solve for x
    x = 369,273,294.57/21,512.28
  6. Step 6: Final answer
    x = 17,165.70

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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.