Home / 20,382.67-28,125.52-11,430.15

Finding the Fourth Proportional to 20,382.67, 28,125.52 and 11,430.15

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Solution

The fourth proportional to 20,382.67, 28,125.52 and 11,430.15 is: 15,772.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.67 : 28,125.52 = 11,430.15 : x
  2. Step 2: Convert to fraction form
    20,382.67/28,125.52 = 11,430.15/x
  3. Step 3: Cross multiply
    20,382.67x = 28,125.52 × 11,430.15
  4. Step 4: Simplify right side
    20,382.67x = 321,478,912.43
  5. Step 5: Solve for x
    x = 321,478,912.43/20,382.67
  6. Step 6: Final answer
    x = 15,772.17

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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.