Home / 9,319.50-12,860.94-5,127.78

Finding the Fourth Proportional to 9,319.50, 12,860.94 and 5,127.78

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Solution

The fourth proportional to 9,319.50, 12,860.94 and 5,127.78 is: 7,076.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,319.50 : 12,860.94 = 5,127.78 : x
  2. Step 2: Convert to fraction form
    9,319.50/12,860.94 = 5,127.78/x
  3. Step 3: Cross multiply
    9,319.50x = 12,860.94 × 5,127.78
  4. Step 4: Simplify right side
    9,319.50x = 65,948,070.91
  5. Step 5: Solve for x
    x = 65,948,070.91/9,319.50
  6. Step 6: Final answer
    x = 7,076.35

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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.