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Finding the Fourth Proportional to 19,719.58, 27,213.03 and 11,335.58

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Solution

The fourth proportional to 19,719.58, 27,213.03 and 11,335.58 is: 15,643.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,719.58 : 27,213.03 = 11,335.58 : x
  2. Step 2: Convert to fraction form
    19,719.58/27,213.03 = 11,335.58/x
  3. Step 3: Cross multiply
    19,719.58x = 27,213.03 × 11,335.58
  4. Step 4: Simplify right side
    19,719.58x = 308,475,478.61
  5. Step 5: Solve for x
    x = 308,475,478.61/19,719.58
  6. Step 6: Final answer
    x = 15,643.11

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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.