Home / 28,002.10-42,003.15-21,003.70

Finding the Fourth Proportional to 28,002.10, 42,003.15 and 21,003.70

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Solution

The fourth proportional to 28,002.10, 42,003.15 and 21,003.70 is: 31,505.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,002.10 : 42,003.15 = 21,003.70 : x
  2. Step 2: Convert to fraction form
    28,002.10/42,003.15 = 21,003.70/x
  3. Step 3: Cross multiply
    28,002.10x = 42,003.15 × 21,003.70
  4. Step 4: Simplify right side
    28,002.10x = 882,221,561.66
  5. Step 5: Solve for x
    x = 882,221,561.66/28,002.10
  6. Step 6: Final answer
    x = 31,505.55

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Similar ratio
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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.