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Finding the Fourth Proportional to 17,981.20, 26,950.20 and 9,211.60

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Solution

The fourth proportional to 17,981.20, 26,950.20 and 9,211.60 is: 13,806.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,981.20 : 26,950.20 = 9,211.60 : x
  2. Step 2: Convert to fraction form
    17,981.20/26,950.20 = 9,211.60/x
  3. Step 3: Cross multiply
    17,981.20x = 26,950.20 × 9,211.60
  4. Step 4: Simplify right side
    17,981.20x = 248,254,462.32
  5. Step 5: Solve for x
    x = 248,254,462.32/17,981.20
  6. Step 6: Final answer
    x = 13,806.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.