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Finding the Fourth Proportional to 7,191.19, 9,921 and 5,307.22

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Solution

The fourth proportional to 7,191.19, 9,921 and 5,307.22 is: 7,321.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.19 : 9,921 = 5,307.22 : x
  2. Step 2: Convert to fraction form
    7,191.19/9,921 = 5,307.22/x
  3. Step 3: Cross multiply
    7,191.19x = 9,921 × 5,307.22
  4. Step 4: Simplify right side
    7,191.19x = 52,652,929.62
  5. Step 5: Solve for x
    x = 52,652,929.62/7,191.19
  6. Step 6: Final answer
    x = 7,321.87

Related Problems

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Half scale
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Double scale
Find fourth proportional to 7,192.19, 9,922.38 and 5,308.22
Similar ratio
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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.