Home / 21,641.57-29,857.58-13,147.20

Finding the Fourth Proportional to 21,641.57, 29,857.58 and 13,147.20

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Solution

The fourth proportional to 21,641.57, 29,857.58 and 13,147.20 is: 18,138.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,641.57 : 29,857.58 = 13,147.20 : x
  2. Step 2: Convert to fraction form
    21,641.57/29,857.58 = 13,147.20/x
  3. Step 3: Cross multiply
    21,641.57x = 29,857.58 × 13,147.20
  4. Step 4: Simplify right side
    21,641.57x = 392,543,510.04
  5. Step 5: Solve for x
    x = 392,543,510.04/21,641.57
  6. Step 6: Final answer
    x = 18,138.40

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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.