Home / 15,403.14-21,261.78-9,115.50

Finding the Fourth Proportional to 15,403.14, 21,261.78 and 9,115.50

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Solution

The fourth proportional to 15,403.14, 21,261.78 and 9,115.50 is: 12,582.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.14 : 21,261.78 = 9,115.50 : x
  2. Step 2: Convert to fraction form
    15,403.14/21,261.78 = 9,115.50/x
  3. Step 3: Cross multiply
    15,403.14x = 21,261.78 × 9,115.50
  4. Step 4: Simplify right side
    15,403.14x = 193,811,755.59
  5. Step 5: Solve for x
    x = 193,811,755.59/15,403.14
  6. Step 6: Final answer
    x = 12,582.61

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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.