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Finding the Fourth Proportional to 7,428.80, 10,255.50 and 5,746.40

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Solution

The fourth proportional to 7,428.80, 10,255.50 and 5,746.40 is: 7,932.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428.80 : 10,255.50 = 5,746.40 : x
  2. Step 2: Convert to fraction form
    7,428.80/10,255.50 = 5,746.40/x
  3. Step 3: Cross multiply
    7,428.80x = 10,255.50 × 5,746.40
  4. Step 4: Simplify right side
    7,428.80x = 58,932,205.20
  5. Step 5: Solve for x
    x = 58,932,205.20/7,428.80
  6. Step 6: Final answer
    x = 7,932.94

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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.