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Finding the Fourth Proportional to 13,903.80, 20,807.10 and 9,724.20

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Solution

The fourth proportional to 13,903.80, 20,807.10 and 9,724.20 is: 14,552.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903.80 : 20,807.10 = 9,724.20 : x
  2. Step 2: Convert to fraction form
    13,903.80/20,807.10 = 9,724.20/x
  3. Step 3: Cross multiply
    13,903.80x = 20,807.10 × 9,724.20
  4. Step 4: Simplify right side
    13,903.80x = 202,332,401.82
  5. Step 5: Solve for x
    x = 202,332,401.82/13,903.80
  6. Step 6: Final answer
    x = 14,552.31

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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.