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Finding the Fourth Proportional to 19,679.20, 27,157.20 and 11,295.52

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Solution

The fourth proportional to 19,679.20, 27,157.20 and 11,295.52 is: 15,587.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,679.20 : 27,157.20 = 11,295.52 : x
  2. Step 2: Convert to fraction form
    19,679.20/27,157.20 = 11,295.52/x
  3. Step 3: Cross multiply
    19,679.20x = 27,157.20 × 11,295.52
  4. Step 4: Simplify right side
    19,679.20x = 306,754,695.74
  5. Step 5: Solve for x
    x = 306,754,695.74/19,679.20
  6. Step 6: Final answer
    x = 15,587.76

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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.