Home / 20,388.30-30,587.31-9,298.32

Finding the Fourth Proportional to 20,388.30, 30,587.31 and 9,298.32

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Solution

The fourth proportional to 20,388.30, 30,587.31 and 9,298.32 is: 13,949.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.30 : 30,587.31 = 9,298.32 : x
  2. Step 2: Convert to fraction form
    20,388.30/30,587.31 = 9,298.32/x
  3. Step 3: Cross multiply
    20,388.30x = 30,587.31 × 9,298.32
  4. Step 4: Simplify right side
    20,388.30x = 284,410,596.32
  5. Step 5: Solve for x
    x = 284,410,596.32/20,388.30
  6. Step 6: Final answer
    x = 13,949.70

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.