Home / 3,146.78-4,345.65-2,851.53

Finding the Fourth Proportional to 3,146.78, 4,345.65 and 2,851.53

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Solution

The fourth proportional to 3,146.78, 4,345.65 and 2,851.53 is: 3,937.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,146.78 : 4,345.65 = 2,851.53 : x
  2. Step 2: Convert to fraction form
    3,146.78/4,345.65 = 2,851.53/x
  3. Step 3: Cross multiply
    3,146.78x = 4,345.65 × 2,851.53
  4. Step 4: Simplify right side
    3,146.78x = 12,391,751.34
  5. Step 5: Solve for x
    x = 12,391,751.34/3,146.78
  6. Step 6: Final answer
    x = 3,937.92

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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.