Home / 15,429.20-21,292.25-8,355.60

Finding the Fourth Proportional to 15,429.20, 21,292.25 and 8,355.60

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Solution

The fourth proportional to 15,429.20, 21,292.25 and 8,355.60 is: 11,530.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.20 : 21,292.25 = 8,355.60 : x
  2. Step 2: Convert to fraction form
    15,429.20/21,292.25 = 8,355.60/x
  3. Step 3: Cross multiply
    15,429.20x = 21,292.25 × 8,355.60
  4. Step 4: Simplify right side
    15,429.20x = 177,909,482.32
  5. Step 5: Solve for x
    x = 177,909,482.32/15,429.20
  6. Step 6: Final answer
    x = 11,530.70

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Half scale
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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.