Home / 15,429.22-21,292.29-8,355.70

Finding the Fourth Proportional to 15,429.22, 21,292.29 and 8,355.70

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Solution

The fourth proportional to 15,429.22, 21,292.29 and 8,355.70 is: 11,530.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.22 : 21,292.29 = 8,355.70 : x
  2. Step 2: Convert to fraction form
    15,429.22/21,292.29 = 8,355.70/x
  3. Step 3: Cross multiply
    15,429.22x = 21,292.29 × 8,355.70
  4. Step 4: Simplify right side
    15,429.22x = 177,911,987.55
  5. Step 5: Solve for x
    x = 177,911,987.55/15,429.22
  6. Step 6: Final answer
    x = 11,530.85

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Double scale
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Similar ratio
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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.