Home / 7,115.78-9,820.01-4,131.43

Finding the Fourth Proportional to 7,115.78, 9,820.01 and 4,131.43

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Solution

The fourth proportional to 7,115.78, 9,820.01 and 4,131.43 is: 5,701.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.78 : 9,820.01 = 4,131.43 : x
  2. Step 2: Convert to fraction form
    7,115.78/9,820.01 = 4,131.43/x
  3. Step 3: Cross multiply
    7,115.78x = 9,820.01 × 4,131.43
  4. Step 4: Simplify right side
    7,115.78x = 40,570,638.71
  5. Step 5: Solve for x
    x = 40,570,638.71/7,115.78
  6. Step 6: Final answer
    x = 5,701.51

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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.