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Finding the Fourth Proportional to 13,329.98, 18,393.19 and 7,878.29

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Solution

The fourth proportional to 13,329.98, 18,393.19 and 7,878.29 is: 10,870.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,329.98 : 18,393.19 = 7,878.29 : x
  2. Step 2: Convert to fraction form
    13,329.98/18,393.19 = 7,878.29/x
  3. Step 3: Cross multiply
    13,329.98x = 18,393.19 × 7,878.29
  4. Step 4: Simplify right side
    13,329.98x = 144,906,884.85
  5. Step 5: Solve for x
    x = 144,906,884.85/13,329.98
  6. Step 6: Final answer
    x = 10,870.75

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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.