Home / 15,811.65-21,819.49-9,098.31

Finding the Fourth Proportional to 15,811.65, 21,819.49 and 9,098.31

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Solution

The fourth proportional to 15,811.65, 21,819.49 and 9,098.31 is: 12,555.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.65 : 21,819.49 = 9,098.31 : x
  2. Step 2: Convert to fraction form
    15,811.65/21,819.49 = 9,098.31/x
  3. Step 3: Cross multiply
    15,811.65x = 21,819.49 × 9,098.31
  4. Step 4: Simplify right side
    15,811.65x = 198,520,543.14
  5. Step 5: Solve for x
    x = 198,520,543.14/15,811.65
  6. Step 6: Final answer
    x = 12,555.33

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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.