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Finding the Fourth Proportional to 19,488.90, 26,894.32 and 10,990.88

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Solution

The fourth proportional to 19,488.90, 26,894.32 and 10,990.88 is: 15,167.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,488.90 : 26,894.32 = 10,990.88 : x
  2. Step 2: Convert to fraction form
    19,488.90/26,894.32 = 10,990.88/x
  3. Step 3: Cross multiply
    19,488.90x = 26,894.32 × 10,990.88
  4. Step 4: Simplify right side
    19,488.90x = 295,592,243.80
  5. Step 5: Solve for x
    x = 295,592,243.80/19,488.90
  6. Step 6: Final answer
    x = 15,167.21

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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.