Home / 3,147.47-4,343.31-1,820.91

Finding the Fourth Proportional to 3,147.47, 4,343.31 and 1,820.91

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Solution

The fourth proportional to 3,147.47, 4,343.31 and 1,820.91 is: 2,512.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.47 : 4,343.31 = 1,820.91 : x
  2. Step 2: Convert to fraction form
    3,147.47/4,343.31 = 1,820.91/x
  3. Step 3: Cross multiply
    3,147.47x = 4,343.31 × 1,820.91
  4. Step 4: Simplify right side
    3,147.47x = 7,908,776.61
  5. Step 5: Solve for x
    x = 7,908,776.61/3,147.47
  6. Step 6: Final answer
    x = 2,512.74

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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.