Home / 15,429.11-21,292.16-8,355.51

Finding the Fourth Proportional to 15,429.11, 21,292.16 and 8,355.51

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Solution

The fourth proportional to 15,429.11, 21,292.16 and 8,355.51 is: 11,530.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.11 : 21,292.16 = 8,355.51 : x
  2. Step 2: Convert to fraction form
    15,429.11/21,292.16 = 8,355.51/x
  3. Step 3: Cross multiply
    15,429.11x = 21,292.16 × 8,355.51
  4. Step 4: Simplify right side
    15,429.11x = 177,906,814.02
  5. Step 5: Solve for x
    x = 177,906,814.02/15,429.11
  6. Step 6: Final answer
    x = 11,530.60

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Double scale
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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.