Home / 5,147.40-7,721.10-4,928.70

Finding the Fourth Proportional to 5,147.40, 7,721.10 and 4,928.70

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Solution

The fourth proportional to 5,147.40, 7,721.10 and 4,928.70 is: 7,393.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.40 : 7,721.10 = 4,928.70 : x
  2. Step 2: Convert to fraction form
    5,147.40/7,721.10 = 4,928.70/x
  3. Step 3: Cross multiply
    5,147.40x = 7,721.10 × 4,928.70
  4. Step 4: Simplify right side
    5,147.40x = 38,054,985.57
  5. Step 5: Solve for x
    x = 38,054,985.57/5,147.40
  6. Step 6: Final answer
    x = 7,393.05

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