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Finding the Fourth Proportional to 15,809.71, 21,819.56 and 9,095.22

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Solution

The fourth proportional to 15,809.71, 21,819.56 and 9,095.22 is: 12,552.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,809.71 : 21,819.56 = 9,095.22 : x
  2. Step 2: Convert to fraction form
    15,809.71/21,819.56 = 9,095.22/x
  3. Step 3: Cross multiply
    15,809.71x = 21,819.56 × 9,095.22
  4. Step 4: Simplify right side
    15,809.71x = 198,453,698.50
  5. Step 5: Solve for x
    x = 198,453,698.50/15,809.71
  6. Step 6: Final answer
    x = 12,552.65

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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.