Home / 15,329.66-21,155.12-9,279.82

Finding the Fourth Proportional to 15,329.66, 21,155.12 and 9,279.82

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Solution

The fourth proportional to 15,329.66, 21,155.12 and 9,279.82 is: 12,806.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,329.66 : 21,155.12 = 9,279.82 : x
  2. Step 2: Convert to fraction form
    15,329.66/21,155.12 = 9,279.82/x
  3. Step 3: Cross multiply
    15,329.66x = 21,155.12 × 9,279.82
  4. Step 4: Simplify right side
    15,329.66x = 196,315,705.68
  5. Step 5: Solve for x
    x = 196,315,705.68/15,329.66
  6. Step 6: Final answer
    x = 12,806.27

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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.