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Finding the Fourth Proportional to 19,111.80, 26,369.10 and 10,728.12

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Solution

The fourth proportional to 19,111.80, 26,369.10 and 10,728.12 is: 14,801.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,111.80 : 26,369.10 = 10,728.12 : x
  2. Step 2: Convert to fraction form
    19,111.80/26,369.10 = 10,728.12/x
  3. Step 3: Cross multiply
    19,111.80x = 26,369.10 × 10,728.12
  4. Step 4: Simplify right side
    19,111.80x = 282,890,869.09
  5. Step 5: Solve for x
    x = 282,890,869.09/19,111.80
  6. Step 6: Final answer
    x = 14,801.90

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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.