Home / 28,431.39-39,227.45-18,360.26

Finding the Fourth Proportional to 28,431.39, 39,227.45 and 18,360.26

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Solution

The fourth proportional to 28,431.39, 39,227.45 and 18,360.26 is: 25,332.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.39 : 39,227.45 = 18,360.26 : x
  2. Step 2: Convert to fraction form
    28,431.39/39,227.45 = 18,360.26/x
  3. Step 3: Cross multiply
    28,431.39x = 39,227.45 × 18,360.26
  4. Step 4: Simplify right side
    28,431.39x = 720,225,893.20
  5. Step 5: Solve for x
    x = 720,225,893.20/28,431.39
  6. Step 6: Final answer
    x = 25,332.07

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Half scale
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Double scale
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Similar ratio
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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.