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Finding the Fourth Proportional to 12,904.91, 17,810.12 and 7,241.19

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Solution

The fourth proportional to 12,904.91, 17,810.12 and 7,241.19 is: 9,993.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,904.91 : 17,810.12 = 7,241.19 : x
  2. Step 2: Convert to fraction form
    12,904.91/17,810.12 = 7,241.19/x
  3. Step 3: Cross multiply
    12,904.91x = 17,810.12 × 7,241.19
  4. Step 4: Simplify right side
    12,904.91x = 128,966,480.95
  5. Step 5: Solve for x
    x = 128,966,480.95/12,904.91
  6. Step 6: Final answer
    x = 9,993.60

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.