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Finding the Fourth Proportional to 19,888.57, 29,833.80 and 11,116.81

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Solution

The fourth proportional to 19,888.57, 29,833.80 and 11,116.81 is: 16,675.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,888.57 : 29,833.80 = 11,116.81 : x
  2. Step 2: Convert to fraction form
    19,888.57/29,833.80 = 11,116.81/x
  3. Step 3: Cross multiply
    19,888.57x = 29,833.80 × 11,116.81
  4. Step 4: Simplify right side
    19,888.57x = 331,656,686.18
  5. Step 5: Solve for x
    x = 331,656,686.18/19,888.57
  6. Step 6: Final answer
    x = 16,675.74

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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.