Home / 15,745.17-21,728.29-8,671.59

Finding the Fourth Proportional to 15,745.17, 21,728.29 and 8,671.59

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Solution

The fourth proportional to 15,745.17, 21,728.29 and 8,671.59 is: 11,966.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.17 : 21,728.29 = 8,671.59 : x
  2. Step 2: Convert to fraction form
    15,745.17/21,728.29 = 8,671.59/x
  3. Step 3: Cross multiply
    15,745.17x = 21,728.29 × 8,671.59
  4. Step 4: Simplify right side
    15,745.17x = 188,418,822.28
  5. Step 5: Solve for x
    x = 188,418,822.28/15,745.17
  6. Step 6: Final answer
    x = 11,966.77

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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.