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Finding the Fourth Proportional to 12,693.80, 17,513.21 and 7,387.49

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Solution

The fourth proportional to 12,693.80, 17,513.21 and 7,387.49 is: 10,192.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,693.80 : 17,513.21 = 7,387.49 : x
  2. Step 2: Convert to fraction form
    12,693.80/17,513.21 = 7,387.49/x
  3. Step 3: Cross multiply
    12,693.80x = 17,513.21 × 7,387.49
  4. Step 4: Simplify right side
    12,693.80x = 129,378,626.81
  5. Step 5: Solve for x
    x = 129,378,626.81/12,693.80
  6. Step 6: Final answer
    x = 10,192.27

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Half 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.