Home / 20,543.70-28,350.27-11,112.30

Finding the Fourth Proportional to 20,543.70, 28,350.27 and 11,112.30

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Solution

The fourth proportional to 20,543.70, 28,350.27 and 11,112.30 is: 15,334.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.70 : 28,350.27 = 11,112.30 : x
  2. Step 2: Convert to fraction form
    20,543.70/28,350.27 = 11,112.30/x
  3. Step 3: Cross multiply
    20,543.70x = 28,350.27 × 11,112.30
  4. Step 4: Simplify right side
    20,543.70x = 315,036,705.32
  5. Step 5: Solve for x
    x = 315,036,705.32/20,543.70
  6. Step 6: Final answer
    x = 15,334.95

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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.