Home / 15,131.43-20,879.13-8,417.15

Finding the Fourth Proportional to 15,131.43, 20,879.13 and 8,417.15

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Solution

The fourth proportional to 15,131.43, 20,879.13 and 8,417.15 is: 11,614.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.43 : 20,879.13 = 8,417.15 : x
  2. Step 2: Convert to fraction form
    15,131.43/20,879.13 = 8,417.15/x
  3. Step 3: Cross multiply
    15,131.43x = 20,879.13 × 8,417.15
  4. Step 4: Simplify right side
    15,131.43x = 175,742,664.68
  5. Step 5: Solve for x
    x = 175,742,664.68/15,131.43
  6. Step 6: Final answer
    x = 11,614.41

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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.