Home / 15,403.39-21,262.13-9,115.75

Finding the Fourth Proportional to 15,403.39, 21,262.13 and 9,115.75

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Solution

The fourth proportional to 15,403.39, 21,262.13 and 9,115.75 is: 12,582.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.39 : 21,262.13 = 9,115.75 : x
  2. Step 2: Convert to fraction form
    15,403.39/21,262.13 = 9,115.75/x
  3. Step 3: Cross multiply
    15,403.39x = 21,262.13 × 9,115.75
  4. Step 4: Simplify right side
    15,403.39x = 193,820,215.97
  5. Step 5: Solve for x
    x = 193,820,215.97/15,403.39
  6. Step 6: Final answer
    x = 12,582.96

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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.