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Finding the Fourth Proportional to 12,448.70, 18,678.54 and 6,603.88

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Solution

The fourth proportional to 12,448.70, 18,678.54 and 6,603.88 is: 9,908.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,448.70 : 18,678.54 = 6,603.88 : x
  2. Step 2: Convert to fraction form
    12,448.70/18,678.54 = 6,603.88/x
  3. Step 3: Cross multiply
    12,448.70x = 18,678.54 × 6,603.88
  4. Step 4: Simplify right side
    12,448.70x = 123,350,743.34
  5. Step 5: Solve for x
    x = 123,350,743.34/12,448.70
  6. Step 6: Final answer
    x = 9,908.72

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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.