Home / 10,232.80-15,338.40-3,990.40

Finding the Fourth Proportional to 10,232.80, 15,338.40 and 3,990.40

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Solution

The fourth proportional to 10,232.80, 15,338.40 and 3,990.40 is: 5,981.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,232.80 : 15,338.40 = 3,990.40 : x
  2. Step 2: Convert to fraction form
    10,232.80/15,338.40 = 3,990.40/x
  3. Step 3: Cross multiply
    10,232.80x = 15,338.40 × 3,990.40
  4. Step 4: Simplify right side
    10,232.80x = 61,206,351.36
  5. Step 5: Solve for x
    x = 61,206,351.36/10,232.80
  6. Step 6: Final answer
    x = 5,981.39

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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.