Home / 20,342.67-28,071.32-11,388.95

Finding the Fourth Proportional to 20,342.67, 28,071.32 and 11,388.95

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Solution

The fourth proportional to 20,342.67, 28,071.32 and 11,388.95 is: 15,715.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.67 : 28,071.32 = 11,388.95 : x
  2. Step 2: Convert to fraction form
    20,342.67/28,071.32 = 11,388.95/x
  3. Step 3: Cross multiply
    20,342.67x = 28,071.32 × 11,388.95
  4. Step 4: Simplify right side
    20,342.67x = 319,702,859.91
  5. Step 5: Solve for x
    x = 319,702,859.91/20,342.67
  6. Step 6: Final answer
    x = 15,715.88

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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.