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Finding the Fourth Proportional to 15,195.84, 20,963.07 and 9,888.72

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Solution

The fourth proportional to 15,195.84, 20,963.07 and 9,888.72 is: 13,641.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,195.84 : 20,963.07 = 9,888.72 : x
  2. Step 2: Convert to fraction form
    15,195.84/20,963.07 = 9,888.72/x
  3. Step 3: Cross multiply
    15,195.84x = 20,963.07 × 9,888.72
  4. Step 4: Simplify right side
    15,195.84x = 207,297,929.57
  5. Step 5: Solve for x
    x = 207,297,929.57/15,195.84
  6. Step 6: Final answer
    x = 13,641.76

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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.