Home / 18,356.28-25,331.76-9,972.78

Finding the Fourth Proportional to 18,356.28, 25,331.76 and 9,972.78

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Solution

The fourth proportional to 18,356.28, 25,331.76 and 9,972.78 is: 13,762.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,356.28 : 25,331.76 = 9,972.78 : x
  2. Step 2: Convert to fraction form
    18,356.28/25,331.76 = 9,972.78/x
  3. Step 3: Cross multiply
    18,356.28x = 25,331.76 × 9,972.78
  4. Step 4: Simplify right side
    18,356.28x = 252,628,069.49
  5. Step 5: Solve for x
    x = 252,628,069.49/18,356.28
  6. Step 6: Final answer
    x = 13,762.49

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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.