Home / 21,671.80-29,885.76-13,175.08

Finding the Fourth Proportional to 21,671.80, 29,885.76 and 13,175.08

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Solution

The fourth proportional to 21,671.80, 29,885.76 and 13,175.08 is: 18,168.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,671.80 : 29,885.76 = 13,175.08 : x
  2. Step 2: Convert to fraction form
    21,671.80/29,885.76 = 13,175.08/x
  3. Step 3: Cross multiply
    21,671.80x = 29,885.76 × 13,175.08
  4. Step 4: Simplify right side
    21,671.80x = 393,747,278.86
  5. Step 5: Solve for x
    x = 393,747,278.86/21,671.80
  6. Step 6: Final answer
    x = 18,168.65

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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.