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Finding the Fourth Proportional to 19,487.13, 26,894.87 and 10,990.99

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Solution

The fourth proportional to 19,487.13, 26,894.87 and 10,990.99 is: 15,169.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,487.13 : 26,894.87 = 10,990.99 : x
  2. Step 2: Convert to fraction form
    19,487.13/26,894.87 = 10,990.99/x
  3. Step 3: Cross multiply
    19,487.13x = 26,894.87 × 10,990.99
  4. Step 4: Simplify right side
    19,487.13x = 295,601,247.22
  5. Step 5: Solve for x
    x = 295,601,247.22/19,487.13
  6. Step 6: Final answer
    x = 15,169.05

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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.