Home / 28,128.10-42,200.62-8,407.30

Finding the Fourth Proportional to 28,128.10, 42,200.62 and 8,407.30

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Solution

The fourth proportional to 28,128.10, 42,200.62 and 8,407.30 is: 12,613.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.10 : 42,200.62 = 8,407.30 : x
  2. Step 2: Convert to fraction form
    28,128.10/42,200.62 = 8,407.30/x
  3. Step 3: Cross multiply
    28,128.10x = 42,200.62 × 8,407.30
  4. Step 4: Simplify right side
    28,128.10x = 354,793,272.53
  5. Step 5: Solve for x
    x = 354,793,272.53/28,128.10
  6. Step 6: Final answer
    x = 12,613.48

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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.