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Finding the Fourth Proportional to 7,389.90, 11,084.85 and 7,069.95

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Solution

The fourth proportional to 7,389.90, 11,084.85 and 7,069.95 is: 10,604.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,389.90 : 11,084.85 = 7,069.95 : x
  2. Step 2: Convert to fraction form
    7,389.90/11,084.85 = 7,069.95/x
  3. Step 3: Cross multiply
    7,389.90x = 11,084.85 × 7,069.95
  4. Step 4: Simplify right side
    7,389.90x = 78,369,335.26
  5. Step 5: Solve for x
    x = 78,369,335.26/7,389.90
  6. Step 6: Final answer
    x = 10,604.93

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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.