Home / 20,680.31-28,538.93-11,248.94

Finding the Fourth Proportional to 20,680.31, 28,538.93 and 11,248.94

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Solution

The fourth proportional to 20,680.31, 28,538.93 and 11,248.94 is: 15,523.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.31 : 28,538.93 = 11,248.94 : x
  2. Step 2: Convert to fraction form
    20,680.31/28,538.93 = 11,248.94/x
  3. Step 3: Cross multiply
    20,680.31x = 28,538.93 × 11,248.94
  4. Step 4: Simplify right side
    20,680.31x = 321,032,711.23
  5. Step 5: Solve for x
    x = 321,032,711.23/20,680.31
  6. Step 6: Final answer
    x = 15,523.59

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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.