Home / 8,805.28-12,151.20-5,220.40

Finding the Fourth Proportional to 8,805.28, 12,151.20 and 5,220.40

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Solution

The fourth proportional to 8,805.28, 12,151.20 and 5,220.40 is: 7,204.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,805.28 : 12,151.20 = 5,220.40 : x
  2. Step 2: Convert to fraction form
    8,805.28/12,151.20 = 5,220.40/x
  3. Step 3: Cross multiply
    8,805.28x = 12,151.20 × 5,220.40
  4. Step 4: Simplify right side
    8,805.28x = 63,434,124.48
  5. Step 5: Solve for x
    x = 63,434,124.48/8,805.28
  6. Step 6: Final answer
    x = 7,204.10

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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.