Home / 15,744.86-21,728.90-8,671.29

Finding the Fourth Proportional to 15,744.86, 21,728.90 and 8,671.29

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Solution

The fourth proportional to 15,744.86, 21,728.90 and 8,671.29 is: 11,966.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,744.86 : 21,728.90 = 8,671.29 : x
  2. Step 2: Convert to fraction form
    15,744.86/21,728.90 = 8,671.29/x
  3. Step 3: Cross multiply
    15,744.86x = 21,728.90 × 8,671.29
  4. Step 4: Simplify right side
    15,744.86x = 188,417,614.96
  5. Step 5: Solve for x
    x = 188,417,614.96/15,744.86
  6. Step 6: Final answer
    x = 11,966.93

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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.