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Finding the Fourth Proportional to 7,449.18, 11,117.18 and 7,147.79

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Solution

The fourth proportional to 7,449.18, 11,117.18 and 7,147.79 is: 10,667.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,449.18 : 11,117.18 = 7,147.79 : x
  2. Step 2: Convert to fraction form
    7,449.18/11,117.18 = 7,147.79/x
  3. Step 3: Cross multiply
    7,449.18x = 11,117.18 × 7,147.79
  4. Step 4: Simplify right side
    7,449.18x = 79,463,176.71
  5. Step 5: Solve for x
    x = 79,463,176.71/7,449.18
  6. Step 6: Final answer
    x = 10,667.37

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Half scale
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Double scale
Find fourth proportional to 7,450.18, 11,118.67 and 7,148.79
Similar ratio
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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.