Home / 9,507.78-13,120.38-5,315.76

Finding the Fourth Proportional to 9,507.78, 13,120.38 and 5,315.76

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Solution

The fourth proportional to 9,507.78, 13,120.38 and 5,315.76 is: 7,335.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,507.78 : 13,120.38 = 5,315.76 : x
  2. Step 2: Convert to fraction form
    9,507.78/13,120.38 = 5,315.76/x
  3. Step 3: Cross multiply
    9,507.78x = 13,120.38 × 5,315.76
  4. Step 4: Simplify right side
    9,507.78x = 69,744,791.19
  5. Step 5: Solve for x
    x = 69,744,791.19/9,507.78
  6. Step 6: Final answer
    x = 7,335.55

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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.