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Finding the Fourth Proportional to 19,368.92, 26,729.99 and 15,169.88

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Solution

The fourth proportional to 19,368.92, 26,729.99 and 15,169.88 is: 20,935.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,368.92 : 26,729.99 = 15,169.88 : x
  2. Step 2: Convert to fraction form
    19,368.92/26,729.99 = 15,169.88/x
  3. Step 3: Cross multiply
    19,368.92x = 26,729.99 × 15,169.88
  4. Step 4: Simplify right side
    19,368.92x = 405,490,531.20
  5. Step 5: Solve for x
    x = 405,490,531.20/19,368.92
  6. Step 6: Final answer
    x = 20,935.12

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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.