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Finding the Fourth Proportional to 12,726.81, 17,562.95 and 7,758.81

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Solution

The fourth proportional to 12,726.81, 17,562.95 and 7,758.81 is: 10,707.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,726.81 : 17,562.95 = 7,758.81 : x
  2. Step 2: Convert to fraction form
    12,726.81/17,562.95 = 7,758.81/x
  3. Step 3: Cross multiply
    12,726.81x = 17,562.95 × 7,758.81
  4. Step 4: Simplify right side
    12,726.81x = 136,267,553.30
  5. Step 5: Solve for x
    x = 136,267,553.30/12,726.81
  6. Step 6: Final answer
    x = 10,707.13

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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.