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Finding the Fourth Proportional to 7,876.48, 10,864.74 and 4,687.64

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Solution

The fourth proportional to 7,876.48, 10,864.74 and 4,687.64 is: 6,466.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.48 : 10,864.74 = 4,687.64 : x
  2. Step 2: Convert to fraction form
    7,876.48/10,864.74 = 4,687.64/x
  3. Step 3: Cross multiply
    7,876.48x = 10,864.74 × 4,687.64
  4. Step 4: Simplify right side
    7,876.48x = 50,929,912.05
  5. Step 5: Solve for x
    x = 50,929,912.05/7,876.48
  6. Step 6: Final answer
    x = 6,466.08

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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.