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Finding the Fourth Proportional to 7,640.39, 10,543.64 and 4,283.20

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Solution

The fourth proportional to 7,640.39, 10,543.64 and 4,283.20 is: 5,910.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,640.39 : 10,543.64 = 4,283.20 : x
  2. Step 2: Convert to fraction form
    7,640.39/10,543.64 = 4,283.20/x
  3. Step 3: Cross multiply
    7,640.39x = 10,543.64 × 4,283.20
  4. Step 4: Simplify right side
    7,640.39x = 45,160,444.71
  5. Step 5: Solve for x
    x = 45,160,444.71/7,640.39
  6. Step 6: Final answer
    x = 5,910.76

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Half scale
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Double scale
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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.