Home / 15,429.06-21,292.12-8,355.49

Finding the Fourth Proportional to 15,429.06, 21,292.12 and 8,355.49

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Solution

The fourth proportional to 15,429.06, 21,292.12 and 8,355.49 is: 11,530.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.06 : 21,292.12 = 8,355.49 : x
  2. Step 2: Convert to fraction form
    15,429.06/21,292.12 = 8,355.49/x
  3. Step 3: Cross multiply
    15,429.06x = 21,292.12 × 8,355.49
  4. Step 4: Simplify right side
    15,429.06x = 177,906,095.74
  5. Step 5: Solve for x
    x = 177,906,095.74/15,429.06
  6. Step 6: Final answer
    x = 11,530.59

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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.