Home / 20,679.68-28,537.79-11,248.23

Finding the Fourth Proportional to 20,679.68, 28,537.79 and 11,248.23

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Solution

The fourth proportional to 20,679.68, 28,537.79 and 11,248.23 is: 15,522.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.68 : 28,537.79 = 11,248.23 : x
  2. Step 2: Convert to fraction form
    20,679.68/28,537.79 = 11,248.23/x
  3. Step 3: Cross multiply
    20,679.68x = 28,537.79 × 11,248.23
  4. Step 4: Simplify right side
    20,679.68x = 320,999,569.37
  5. Step 5: Solve for x
    x = 320,999,569.37/20,679.68
  6. Step 6: Final answer
    x = 15,522.47

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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.