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Finding the Fourth Proportional to 12,798.62, 17,663.12 and 7,135.20

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Solution

The fourth proportional to 12,798.62, 17,663.12 and 7,135.20 is: 9,847.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,798.62 : 17,663.12 = 7,135.20 : x
  2. Step 2: Convert to fraction form
    12,798.62/17,663.12 = 7,135.20/x
  3. Step 3: Cross multiply
    12,798.62x = 17,663.12 × 7,135.20
  4. Step 4: Simplify right side
    12,798.62x = 126,029,933.74
  5. Step 5: Solve for x
    x = 126,029,933.74/12,798.62
  6. Step 6: Final answer
    x = 9,847.15

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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.