Home / 5,139.17-7,092.10-2,781.35

Finding the Fourth Proportional to 5,139.17, 7,092.10 and 2,781.35

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Solution

The fourth proportional to 5,139.17, 7,092.10 and 2,781.35 is: 3,838.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.17 : 7,092.10 = 2,781.35 : x
  2. Step 2: Convert to fraction form
    5,139.17/7,092.10 = 2,781.35/x
  3. Step 3: Cross multiply
    5,139.17x = 7,092.10 × 2,781.35
  4. Step 4: Simplify right side
    5,139.17x = 19,725,612.34
  5. Step 5: Solve for x
    x = 19,725,612.34/5,139.17
  6. Step 6: Final answer
    x = 3,838.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.