Home / 21,707.46-29,961.18-12,279.06

Finding the Fourth Proportional to 21,707.46, 29,961.18 and 12,279.06

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Solution

The fourth proportional to 21,707.46, 29,961.18 and 12,279.06 is: 16,947.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,707.46 : 29,961.18 = 12,279.06 : x
  2. Step 2: Convert to fraction form
    21,707.46/29,961.18 = 12,279.06/x
  3. Step 3: Cross multiply
    21,707.46x = 29,961.18 × 12,279.06
  4. Step 4: Simplify right side
    21,707.46x = 367,895,126.89
  5. Step 5: Solve for x
    x = 367,895,126.89/21,707.46
  6. Step 6: Final answer
    x = 16,947.87

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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.