Home / 28,221.87-42,296.15-21,146.31

Finding the Fourth Proportional to 28,221.87, 42,296.15 and 21,146.31

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Solution

The fourth proportional to 28,221.87, 42,296.15 and 21,146.31 is: 31,692.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,221.87 : 42,296.15 = 21,146.31 : x
  2. Step 2: Convert to fraction form
    28,221.87/42,296.15 = 21,146.31/x
  3. Step 3: Cross multiply
    28,221.87x = 42,296.15 × 21,146.31
  4. Step 4: Simplify right side
    28,221.87x = 894,407,393.97
  5. Step 5: Solve for x
    x = 894,407,393.97/28,221.87
  6. Step 6: Final answer
    x = 31,692.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.