Home / 15,990.06-23,980.20-7,665.78

Finding the Fourth Proportional to 15,990.06, 23,980.20 and 7,665.78

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Solution

The fourth proportional to 15,990.06, 23,980.20 and 7,665.78 is: 11,496.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,990.06 : 23,980.20 = 7,665.78 : x
  2. Step 2: Convert to fraction form
    15,990.06/23,980.20 = 7,665.78/x
  3. Step 3: Cross multiply
    15,990.06x = 23,980.20 × 7,665.78
  4. Step 4: Simplify right side
    15,990.06x = 183,826,937.56
  5. Step 5: Solve for x
    x = 183,826,937.56/15,990.06
  6. Step 6: Final answer
    x = 11,496.33

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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.