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Finding the Fourth Proportional to 5,509.68, 7,603.20 and 3,151.68

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Solution

The fourth proportional to 5,509.68, 7,603.20 and 3,151.68 is: 4,349.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,509.68 : 7,603.20 = 3,151.68 : x
  2. Step 2: Convert to fraction form
    5,509.68/7,603.20 = 3,151.68/x
  3. Step 3: Cross multiply
    5,509.68x = 7,603.20 × 3,151.68
  4. Step 4: Simplify right side
    5,509.68x = 23,962,853.38
  5. Step 5: Solve for x
    x = 23,962,853.38/5,509.68
  6. Step 6: Final answer
    x = 4,349.23

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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.