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Finding the Fourth Proportional to 7,891.32, 10,890.24 and 4,354.80

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Solution

The fourth proportional to 7,891.32, 10,890.24 and 4,354.80 is: 6,009.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.32 : 10,890.24 = 4,354.80 : x
  2. Step 2: Convert to fraction form
    7,891.32/10,890.24 = 4,354.80/x
  3. Step 3: Cross multiply
    7,891.32x = 10,890.24 × 4,354.80
  4. Step 4: Simplify right side
    7,891.32x = 47,424,817.15
  5. Step 5: Solve for x
    x = 47,424,817.15/7,891.32
  6. Step 6: Final answer
    x = 6,009.74

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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.