Home / 15,131.40-20,879.94-11,154.70

Finding the Fourth Proportional to 15,131.40, 20,879.94 and 11,154.70

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Solution

The fourth proportional to 15,131.40, 20,879.94 and 11,154.70 is: 15,392.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.40 : 20,879.94 = 11,154.70 : x
  2. Step 2: Convert to fraction form
    15,131.40/20,879.94 = 11,154.70/x
  3. Step 3: Cross multiply
    15,131.40x = 20,879.94 × 11,154.70
  4. Step 4: Simplify right side
    15,131.40x = 232,909,466.72
  5. Step 5: Solve for x
    x = 232,909,466.72/15,131.40
  6. Step 6: Final answer
    x = 15,392.46

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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.