Home / 5,385.12-8,077.76-1,875.18

Finding the Fourth Proportional to 5,385.12, 8,077.76 and 1,875.18

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Solution

The fourth proportional to 5,385.12, 8,077.76 and 1,875.18 is: 2,812.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.12 : 8,077.76 = 1,875.18 : x
  2. Step 2: Convert to fraction form
    5,385.12/8,077.76 = 1,875.18/x
  3. Step 3: Cross multiply
    5,385.12x = 8,077.76 × 1,875.18
  4. Step 4: Simplify right side
    5,385.12x = 15,147,244.62
  5. Step 5: Solve for x
    x = 15,147,244.62/5,385.12
  6. Step 6: Final answer
    x = 2,812.80

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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.