Home / 7,620.64-11,423.16-5,155.72

Finding the Fourth Proportional to 7,620.64, 11,423.16 and 5,155.72

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Solution

The fourth proportional to 7,620.64, 11,423.16 and 5,155.72 is: 7,728.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.64 : 11,423.16 = 5,155.72 : x
  2. Step 2: Convert to fraction form
    7,620.64/11,423.16 = 5,155.72/x
  3. Step 3: Cross multiply
    7,620.64x = 11,423.16 × 5,155.72
  4. Step 4: Simplify right side
    7,620.64x = 58,894,585.92
  5. Step 5: Solve for x
    x = 58,894,585.92/7,620.64
  6. Step 6: Final answer
    x = 7,728.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.