Home / 28,120.04-42,180.08-8,398.60

Finding the Fourth Proportional to 28,120.04, 42,180.08 and 8,398.60

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Solution

The fourth proportional to 28,120.04, 42,180.08 and 8,398.60 is: 12,597.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,120.04 : 42,180.08 = 8,398.60 : x
  2. Step 2: Convert to fraction form
    28,120.04/42,180.08 = 8,398.60/x
  3. Step 3: Cross multiply
    28,120.04x = 42,180.08 × 8,398.60
  4. Step 4: Simplify right side
    28,120.04x = 354,253,619.89
  5. Step 5: Solve for x
    x = 354,253,619.89/28,120.04
  6. Step 6: Final answer
    x = 12,597.91

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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.