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Finding the Fourth Proportional to 5,170.74, 7,720.99 and 5,030.61

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Solution

The fourth proportional to 5,170.74, 7,720.99 and 5,030.61 is: 7,511.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,170.74 : 7,720.99 = 5,030.61 : x
  2. Step 2: Convert to fraction form
    5,170.74/7,720.99 = 5,030.61/x
  3. Step 3: Cross multiply
    5,170.74x = 7,720.99 × 5,030.61
  4. Step 4: Simplify right side
    5,170.74x = 38,841,289.50
  5. Step 5: Solve for x
    x = 38,841,289.50/5,170.74
  6. Step 6: Final answer
    x = 7,511.75

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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 (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.