Home / 20,480.25-28,264.88-12,527.78

Finding the Fourth Proportional to 20,480.25, 28,264.88 and 12,527.78

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Solution

The fourth proportional to 20,480.25, 28,264.88 and 12,527.78 is: 17,289.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.25 : 28,264.88 = 12,527.78 : x
  2. Step 2: Convert to fraction form
    20,480.25/28,264.88 = 12,527.78/x
  3. Step 3: Cross multiply
    20,480.25x = 28,264.88 × 12,527.78
  4. Step 4: Simplify right side
    20,480.25x = 354,096,088.36
  5. Step 5: Solve for x
    x = 354,096,088.36/20,480.25
  6. Step 6: Final answer
    x = 17,289.63

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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.