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Finding the Fourth Proportional to 15,340.80, 23,011.20 and 5,480.40

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Solution

The fourth proportional to 15,340.80, 23,011.20 and 5,480.40 is: 8,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,340.80 : 23,011.20 = 5,480.40 : x
  2. Step 2: Convert to fraction form
    15,340.80/23,011.20 = 5,480.40/x
  3. Step 3: Cross multiply
    15,340.80x = 23,011.20 × 5,480.40
  4. Step 4: Simplify right side
    15,340.80x = 126,110,580.48
  5. Step 5: Solve for x
    x = 126,110,580.48/15,340.80
  6. Step 6: Final answer
    x = 8,220.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.