Home / 9,116.90-12,582.51-5,138.78

Finding the Fourth Proportional to 9,116.90, 12,582.51 and 5,138.78

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Solution

The fourth proportional to 9,116.90, 12,582.51 and 5,138.78 is: 7,092.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,116.90 : 12,582.51 = 5,138.78 : x
  2. Step 2: Convert to fraction form
    9,116.90/12,582.51 = 5,138.78/x
  3. Step 3: Cross multiply
    9,116.90x = 12,582.51 × 5,138.78
  4. Step 4: Simplify right side
    9,116.90x = 64,658,750.74
  5. Step 5: Solve for x
    x = 64,658,750.74/9,116.90
  6. Step 6: Final answer
    x = 7,092.19

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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.