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Finding the Fourth Proportional to 13,574.80, 20,335.20 and 11,951.20

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Solution

The fourth proportional to 13,574.80, 20,335.20 and 11,951.20 is: 17,903.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,574.80 : 20,335.20 = 11,951.20 : x
  2. Step 2: Convert to fraction form
    13,574.80/20,335.20 = 11,951.20/x
  3. Step 3: Cross multiply
    13,574.80x = 20,335.20 × 11,951.20
  4. Step 4: Simplify right side
    13,574.80x = 243,030,042.24
  5. Step 5: Solve for x
    x = 243,030,042.24/13,574.80
  6. Step 6: Final answer
    x = 17,903.03

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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.