Home / 15,131.25-20,865.33-9,160.74

Finding the Fourth Proportional to 15,131.25, 20,865.33 and 9,160.74

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Solution

The fourth proportional to 15,131.25, 20,865.33 and 9,160.74 is: 12,632.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.25 : 20,865.33 = 9,160.74 : x
  2. Step 2: Convert to fraction form
    15,131.25/20,865.33 = 9,160.74/x
  3. Step 3: Cross multiply
    15,131.25x = 20,865.33 × 9,160.74
  4. Step 4: Simplify right side
    15,131.25x = 191,141,863.14
  5. Step 5: Solve for x
    x = 191,141,863.14/15,131.25
  6. Step 6: Final answer
    x = 12,632.26

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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.