Home / 30,517.07-42,111.44-20,443.88

Finding the Fourth Proportional to 30,517.07, 42,111.44 and 20,443.88

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Solution

The fourth proportional to 30,517.07, 42,111.44 and 20,443.88 is: 28,211.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,517.07 : 42,111.44 = 20,443.88 : x
  2. Step 2: Convert to fraction form
    30,517.07/42,111.44 = 20,443.88/x
  3. Step 3: Cross multiply
    30,517.07x = 42,111.44 × 20,443.88
  4. Step 4: Simplify right side
    30,517.07x = 860,921,123.77
  5. Step 5: Solve for x
    x = 860,921,123.77/30,517.07
  6. Step 6: Final answer
    x = 28,211.13

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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.