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Finding the Fourth Proportional to 15,879, 21,913.02 and 8,806.89

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Solution

The fourth proportional to 15,879, 21,913.02 and 8,806.89 is: 12,153.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879 : 21,913.02 = 8,806.89 : x
  2. Step 2: Convert to fraction form
    15,879/21,913.02 = 8,806.89/x
  3. Step 3: Cross multiply
    15,879x = 21,913.02 × 8,806.89
  4. Step 4: Simplify right side
    15,879x = 192,985,556.71
  5. Step 5: Solve for x
    x = 192,985,556.71/15,879
  6. Step 6: Final answer
    x = 12,153.51

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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.