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Finding the Fourth Proportional to 9,907.11, 14,860.67 and 5,290.11

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Solution

The fourth proportional to 9,907.11, 14,860.67 and 5,290.11 is: 7,935.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,907.11 : 14,860.67 = 5,290.11 : x
  2. Step 2: Convert to fraction form
    9,907.11/14,860.67 = 5,290.11/x
  3. Step 3: Cross multiply
    9,907.11x = 14,860.67 × 5,290.11
  4. Step 4: Simplify right side
    9,907.11x = 78,614,552.52
  5. Step 5: Solve for x
    x = 78,614,552.52/9,907.11
  6. Step 6: Final answer
    x = 7,935.17

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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.