Home / 9,189.12-12,681.12-4,997.28

Finding the Fourth Proportional to 9,189.12, 12,681.12 and 4,997.28

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Solution

The fourth proportional to 9,189.12, 12,681.12 and 4,997.28 is: 6,896.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,189.12 : 12,681.12 = 4,997.28 : x
  2. Step 2: Convert to fraction form
    9,189.12/12,681.12 = 4,997.28/x
  3. Step 3: Cross multiply
    9,189.12x = 12,681.12 × 4,997.28
  4. Step 4: Simplify right side
    9,189.12x = 63,371,107.35
  5. Step 5: Solve for x
    x = 63,371,107.35/9,189.12
  6. Step 6: Final answer
    x = 6,896.32

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Half scale
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Double scale
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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.