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Finding the Fourth Proportional to 7,869.72, 10,860.36 and 4,333.20

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Solution

The fourth proportional to 7,869.72, 10,860.36 and 4,333.20 is: 5,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,869.72 : 10,860.36 = 4,333.20 : x
  2. Step 2: Convert to fraction form
    7,869.72/10,860.36 = 4,333.20/x
  3. Step 3: Cross multiply
    7,869.72x = 10,860.36 × 4,333.20
  4. Step 4: Simplify right side
    7,869.72x = 47,060,111.95
  5. Step 5: Solve for x
    x = 47,060,111.95/7,869.72
  6. Step 6: Final answer
    x = 5,979.90

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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.