Home / 30,868.17-42,595.86-18,121.88

Finding the Fourth Proportional to 30,868.17, 42,595.86 and 18,121.88

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Solution

The fourth proportional to 30,868.17, 42,595.86 and 18,121.88 is: 25,006.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,868.17 : 42,595.86 = 18,121.88 : x
  2. Step 2: Convert to fraction form
    30,868.17/42,595.86 = 18,121.88/x
  3. Step 3: Cross multiply
    30,868.17x = 42,595.86 × 18,121.88
  4. Step 4: Simplify right side
    30,868.17x = 771,916,850.44
  5. Step 5: Solve for x
    x = 771,916,850.44/30,868.17
  6. Step 6: Final answer
    x = 25,006.89

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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.