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Finding the Fourth Proportional to 19,920.29, 27,489.84 and 10,967.94

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Solution

The fourth proportional to 19,920.29, 27,489.84 and 10,967.94 is: 15,135.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.29 : 27,489.84 = 10,967.94 : x
  2. Step 2: Convert to fraction form
    19,920.29/27,489.84 = 10,967.94/x
  3. Step 3: Cross multiply
    19,920.29x = 27,489.84 × 10,967.94
  4. Step 4: Simplify right side
    19,920.29x = 301,506,915.73
  5. Step 5: Solve for x
    x = 301,506,915.73/19,920.29
  6. Step 6: Final answer
    x = 15,135.67

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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.