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Finding the Fourth Proportional to 13,182.80, 19,726.20 and 9,726.80

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Solution

The fourth proportional to 13,182.80, 19,726.20 and 9,726.80 is: 14,554.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,182.80 : 19,726.20 = 9,726.80 : x
  2. Step 2: Convert to fraction form
    13,182.80/19,726.20 = 9,726.80/x
  3. Step 3: Cross multiply
    13,182.80x = 19,726.20 × 9,726.80
  4. Step 4: Simplify right side
    13,182.80x = 191,872,802.16
  5. Step 5: Solve for x
    x = 191,872,802.16/13,182.80
  6. Step 6: Final answer
    x = 14,554.78

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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.