Home / 5,135.25-7,686.21-2,666.55

Finding the Fourth Proportional to 5,135.25, 7,686.21 and 2,666.55

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Solution

The fourth proportional to 5,135.25, 7,686.21 and 2,666.55 is: 3,991.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.25 : 7,686.21 = 2,666.55 : x
  2. Step 2: Convert to fraction form
    5,135.25/7,686.21 = 2,666.55/x
  3. Step 3: Cross multiply
    5,135.25x = 7,686.21 × 2,666.55
  4. Step 4: Simplify right side
    5,135.25x = 20,495,663.28
  5. Step 5: Solve for x
    x = 20,495,663.28/5,135.25
  6. Step 6: Final answer
    x = 3,991.17

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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.