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Finding the Fourth Proportional to 19,696.20, 29,510.88 and 11,888.64

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Solution

The fourth proportional to 19,696.20, 29,510.88 and 11,888.64 is: 17,812.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,696.20 : 29,510.88 = 11,888.64 : x
  2. Step 2: Convert to fraction form
    19,696.20/29,510.88 = 11,888.64/x
  3. Step 3: Cross multiply
    19,696.20x = 29,510.88 × 11,888.64
  4. Step 4: Simplify right side
    19,696.20x = 350,844,228.40
  5. Step 5: Solve for x
    x = 350,844,228.40/19,696.20
  6. Step 6: Final answer
    x = 17,812.79

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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.