Home / 21,537.28-29,720.16-12,105.76

Finding the Fourth Proportional to 21,537.28, 29,720.16 and 12,105.76

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Solution

The fourth proportional to 21,537.28, 29,720.16 and 12,105.76 is: 16,705.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,537.28 : 29,720.16 = 12,105.76 : x
  2. Step 2: Convert to fraction form
    21,537.28/29,720.16 = 12,105.76/x
  3. Step 3: Cross multiply
    21,537.28x = 29,720.16 × 12,105.76
  4. Step 4: Simplify right side
    21,537.28x = 359,785,124.12
  5. Step 5: Solve for x
    x = 359,785,124.12/21,537.28
  6. Step 6: Final answer
    x = 16,705.23

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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.