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Finding the Fourth Proportional to 13,959.90, 20,903.40 and 9,002.70

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Solution

The fourth proportional to 13,959.90, 20,903.40 and 9,002.70 is: 13,480.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.90 : 20,903.40 = 9,002.70 : x
  2. Step 2: Convert to fraction form
    13,959.90/20,903.40 = 9,002.70/x
  3. Step 3: Cross multiply
    13,959.90x = 20,903.40 × 9,002.70
  4. Step 4: Simplify right side
    13,959.90x = 188,187,039.18
  5. Step 5: Solve for x
    x = 188,187,039.18/13,959.90
  6. Step 6: Final answer
    x = 13,480.54

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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.