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Finding the Fourth Proportional to 15,803.88, 21,806.60 and 9,089.79

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Solution

The fourth proportional to 15,803.88, 21,806.60 and 9,089.79 is: 12,542.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,803.88 : 21,806.60 = 9,089.79 : x
  2. Step 2: Convert to fraction form
    15,803.88/21,806.60 = 9,089.79/x
  3. Step 3: Cross multiply
    15,803.88x = 21,806.60 × 9,089.79
  4. Step 4: Simplify right side
    15,803.88x = 198,217,369.17
  5. Step 5: Solve for x
    x = 198,217,369.17/15,803.88
  6. Step 6: Final answer
    x = 12,542.32

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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.