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Finding the Fourth Proportional to 7,641.60, 10,542.30 and 4,454.40

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Solution

The fourth proportional to 7,641.60, 10,542.30 and 4,454.40 is: 6,145.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,641.60 : 10,542.30 = 4,454.40 : x
  2. Step 2: Convert to fraction form
    7,641.60/10,542.30 = 4,454.40/x
  3. Step 3: Cross multiply
    7,641.60x = 10,542.30 × 4,454.40
  4. Step 4: Simplify right side
    7,641.60x = 46,959,621.12
  5. Step 5: Solve for x
    x = 46,959,621.12/7,641.60
  6. Step 6: Final answer
    x = 6,145.26

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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.