Home / 28,221.12-42,295.02-21,145.56

Finding the Fourth Proportional to 28,221.12, 42,295.02 and 21,145.56

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Solution

The fourth proportional to 28,221.12, 42,295.02 and 21,145.56 is: 31,690.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,221.12 : 42,295.02 = 21,145.56 : x
  2. Step 2: Convert to fraction form
    28,221.12/42,295.02 = 21,145.56/x
  3. Step 3: Cross multiply
    28,221.12x = 42,295.02 × 21,145.56
  4. Step 4: Simplify right side
    28,221.12x = 894,351,883.11
  5. Step 5: Solve for x
    x = 894,351,883.11/28,221.12
  6. Step 6: Final answer
    x = 31,690.87

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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.