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Finding the Fourth Proportional to 12,663.95, 18,995.88 and 3,429.95

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Solution

The fourth proportional to 12,663.95, 18,995.88 and 3,429.95 is: 5,144.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,663.95 : 18,995.88 = 3,429.95 : x
  2. Step 2: Convert to fraction form
    12,663.95/18,995.88 = 3,429.95/x
  3. Step 3: Cross multiply
    12,663.95x = 18,995.88 × 3,429.95
  4. Step 4: Simplify right side
    12,663.95x = 65,154,918.61
  5. Step 5: Solve for x
    x = 65,154,918.61/12,663.95
  6. Step 6: Final answer
    x = 5,144.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.