Home / 9,115.51-12,579.40-4,923.76

Finding the Fourth Proportional to 9,115.51, 12,579.40 and 4,923.76

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Solution

The fourth proportional to 9,115.51, 12,579.40 and 4,923.76 is: 6,794.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.51 : 12,579.40 = 4,923.76 : x
  2. Step 2: Convert to fraction form
    9,115.51/12,579.40 = 4,923.76/x
  3. Step 3: Cross multiply
    9,115.51x = 12,579.40 × 4,923.76
  4. Step 4: Simplify right side
    9,115.51x = 61,937,921.93
  5. Step 5: Solve for x
    x = 61,937,921.93/9,115.51
  6. Step 6: Final answer
    x = 6,794.78

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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.