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Finding the Fourth Proportional to 19,990.84, 27,581.84 and 11,492.52

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Solution

The fourth proportional to 19,990.84, 27,581.84 and 11,492.52 is: 15,856.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.84 : 27,581.84 = 11,492.52 : x
  2. Step 2: Convert to fraction form
    19,990.84/27,581.84 = 11,492.52/x
  3. Step 3: Cross multiply
    19,990.84x = 27,581.84 × 11,492.52
  4. Step 4: Simplify right side
    19,990.84x = 316,984,847.84
  5. Step 5: Solve for x
    x = 316,984,847.84/19,990.84
  6. Step 6: Final answer
    x = 15,856.50

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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.