Home / 45,298.32-67,878.20-18,988.72

Finding the Fourth Proportional to 45,298.32, 67,878.20 and 18,988.72

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Solution

The fourth proportional to 45,298.32, 67,878.20 and 18,988.72 is: 28,454.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,298.32 : 67,878.20 = 18,988.72 : x
  2. Step 2: Convert to fraction form
    45,298.32/67,878.20 = 18,988.72/x
  3. Step 3: Cross multiply
    45,298.32x = 67,878.20 × 18,988.72
  4. Step 4: Simplify right side
    45,298.32x = 1,288,920,133.90
  5. Step 5: Solve for x
    x = 1,288,920,133.90/45,298.32
  6. Step 6: Final answer
    x = 28,454.04

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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.