Home / 12,589.09-17,381.96-8,820.61

Finding the Fourth Proportional to 12,589.09, 17,381.96 and 8,820.61

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Solution

The fourth proportional to 12,589.09, 17,381.96 and 8,820.61 is: 12,178.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,589.09 : 17,381.96 = 8,820.61 : x
  2. Step 2: Convert to fraction form
    12,589.09/17,381.96 = 8,820.61/x
  3. Step 3: Cross multiply
    12,589.09x = 17,381.96 × 8,820.61
  4. Step 4: Simplify right side
    12,589.09x = 153,319,490.20
  5. Step 5: Solve for x
    x = 153,319,490.20/12,589.09
  6. Step 6: Final answer
    x = 12,178.76

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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.