Home / 21,680.42-29,919.57-12,248.78

Finding the Fourth Proportional to 21,680.42, 29,919.57 and 12,248.78

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Solution

The fourth proportional to 21,680.42, 29,919.57 and 12,248.78 is: 16,903.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,680.42 : 29,919.57 = 12,248.78 : x
  2. Step 2: Convert to fraction form
    21,680.42/29,919.57 = 12,248.78/x
  3. Step 3: Cross multiply
    21,680.42x = 29,919.57 × 12,248.78
  4. Step 4: Simplify right side
    21,680.42x = 366,478,259.49
  5. Step 5: Solve for x
    x = 366,478,259.49/21,680.42
  6. Step 6: Final answer
    x = 16,903.65

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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.