Home / 30,120.60-45,180.90-28,516.80

Finding the Fourth Proportional to 30,120.60, 45,180.90 and 28,516.80

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Solution

The fourth proportional to 30,120.60, 45,180.90 and 28,516.80 is: 42,775.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,120.60 : 45,180.90 = 28,516.80 : x
  2. Step 2: Convert to fraction form
    30,120.60/45,180.90 = 28,516.80/x
  3. Step 3: Cross multiply
    30,120.60x = 45,180.90 × 28,516.80
  4. Step 4: Simplify right side
    30,120.60x = 1,288,414,689.12
  5. Step 5: Solve for x
    x = 1,288,414,689.12/30,120.60
  6. Step 6: Final answer
    x = 42,775.20

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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.