Home / 10,420.13-15,630.20-3,499.49

Finding the Fourth Proportional to 10,420.13, 15,630.20 and 3,499.49

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Solution

The fourth proportional to 10,420.13, 15,630.20 and 3,499.49 is: 5,249.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,420.13 : 15,630.20 = 3,499.49 : x
  2. Step 2: Convert to fraction form
    10,420.13/15,630.20 = 3,499.49/x
  3. Step 3: Cross multiply
    10,420.13x = 15,630.20 × 3,499.49
  4. Step 4: Simplify right side
    10,420.13x = 54,697,728.60
  5. Step 5: Solve for x
    x = 54,697,728.60/10,420.13
  6. Step 6: Final answer
    x = 5,249.24

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