Home / 28,103.38-38,782.68-15,528.12

Finding the Fourth Proportional to 28,103.38, 38,782.68 and 15,528.12

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Solution

The fourth proportional to 28,103.38, 38,782.68 and 15,528.12 is: 21,428.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,103.38 : 38,782.68 = 15,528.12 : x
  2. Step 2: Convert to fraction form
    28,103.38/38,782.68 = 15,528.12/x
  3. Step 3: Cross multiply
    28,103.38x = 38,782.68 × 15,528.12
  4. Step 4: Simplify right side
    28,103.38x = 602,222,108.96
  5. Step 5: Solve for x
    x = 602,222,108.96/28,103.38
  6. Step 6: Final answer
    x = 21,428.81

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Half scale
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Double scale
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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.