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Finding the Fourth Proportional to 19,776.76, 27,301.80 and 11,391.64

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Solution

The fourth proportional to 19,776.76, 27,301.80 and 11,391.64 is: 15,726.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,776.76 : 27,301.80 = 11,391.64 : x
  2. Step 2: Convert to fraction form
    19,776.76/27,301.80 = 11,391.64/x
  3. Step 3: Cross multiply
    19,776.76x = 27,301.80 × 11,391.64
  4. Step 4: Simplify right side
    19,776.76x = 311,012,276.95
  5. Step 5: Solve for x
    x = 311,012,276.95/19,776.76
  6. Step 6: Final answer
    x = 15,726.15

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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.