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Finding the Fourth Proportional to 7,242.40, 9,995.16 and 4,256.74

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Solution

The fourth proportional to 7,242.40, 9,995.16 and 4,256.74 is: 5,874.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,242.40 : 9,995.16 = 4,256.74 : x
  2. Step 2: Convert to fraction form
    7,242.40/9,995.16 = 4,256.74/x
  3. Step 3: Cross multiply
    7,242.40x = 9,995.16 × 4,256.74
  4. Step 4: Simplify right side
    7,242.40x = 42,546,797.38
  5. Step 5: Solve for x
    x = 42,546,797.38/7,242.40
  6. Step 6: Final answer
    x = 5,874.68

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Half scale
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Double scale
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Similar ratio
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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.