Home / 20,207.28-27,881.40-12,247.86

Finding the Fourth Proportional to 20,207.28, 27,881.40 and 12,247.86

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Solution

The fourth proportional to 20,207.28, 27,881.40 and 12,247.86 is: 16,899.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,207.28 : 27,881.40 = 12,247.86 : x
  2. Step 2: Convert to fraction form
    20,207.28/27,881.40 = 12,247.86/x
  3. Step 3: Cross multiply
    20,207.28x = 27,881.40 × 12,247.86
  4. Step 4: Simplify right side
    20,207.28x = 341,487,483.80
  5. Step 5: Solve for x
    x = 341,487,483.80/20,207.28
  6. Step 6: Final answer
    x = 16,899.23

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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.