Home / 5,142.77-7,712.95-1,445.35

Finding the Fourth Proportional to 5,142.77, 7,712.95 and 1,445.35

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Solution

The fourth proportional to 5,142.77, 7,712.95 and 1,445.35 is: 2,167.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,142.77 : 7,712.95 = 1,445.35 : x
  2. Step 2: Convert to fraction form
    5,142.77/7,712.95 = 1,445.35/x
  3. Step 3: Cross multiply
    5,142.77x = 7,712.95 × 1,445.35
  4. Step 4: Simplify right side
    5,142.77x = 11,147,912.28
  5. Step 5: Solve for x
    x = 11,147,912.28/5,142.77
  6. Step 6: Final answer
    x = 2,167.69

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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.