Home / 20,340.67-28,071.19-11,387.64

Finding the Fourth Proportional to 20,340.67, 28,071.19 and 11,387.64

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Solution

The fourth proportional to 20,340.67, 28,071.19 and 11,387.64 is: 15,715.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.67 : 28,071.19 = 11,387.64 : x
  2. Step 2: Convert to fraction form
    20,340.67/28,071.19 = 11,387.64/x
  3. Step 3: Cross multiply
    20,340.67x = 28,071.19 × 11,387.64
  4. Step 4: Simplify right side
    20,340.67x = 319,664,619.33
  5. Step 5: Solve for x
    x = 319,664,619.33/20,340.67
  6. Step 6: Final answer
    x = 15,715.54

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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.