Home / 20,761.50-28,663.83-13,322.46

Finding the Fourth Proportional to 20,761.50, 28,663.83 and 13,322.46

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Solution

The fourth proportional to 20,761.50, 28,663.83 and 13,322.46 is: 18,393.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.50 : 28,663.83 = 13,322.46 : x
  2. Step 2: Convert to fraction form
    20,761.50/28,663.83 = 13,322.46/x
  3. Step 3: Cross multiply
    20,761.50x = 28,663.83 × 13,322.46
  4. Step 4: Simplify right side
    20,761.50x = 381,872,728.62
  5. Step 5: Solve for x
    x = 381,872,728.62/20,761.50
  6. Step 6: Final answer
    x = 18,393.31

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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.