Home / 7,121.04-10,681.56-5,185.56

Finding the Fourth Proportional to 7,121.04, 10,681.56 and 5,185.56

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Solution

The fourth proportional to 7,121.04, 10,681.56 and 5,185.56 is: 7,778.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.04 : 10,681.56 = 5,185.56 : x
  2. Step 2: Convert to fraction form
    7,121.04/10,681.56 = 5,185.56/x
  3. Step 3: Cross multiply
    7,121.04x = 10,681.56 × 5,185.56
  4. Step 4: Simplify right side
    7,121.04x = 55,389,870.27
  5. Step 5: Solve for x
    x = 55,389,870.27/7,121.04
  6. Step 6: Final answer
    x = 7,778.34

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