Home / 13,130.42-18,122.90-8,349.39

Finding the Fourth Proportional to 13,130.42, 18,122.90 and 8,349.39

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Solution

The fourth proportional to 13,130.42, 18,122.90 and 8,349.39 is: 11,524.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.42 : 18,122.90 = 8,349.39 : x
  2. Step 2: Convert to fraction form
    13,130.42/18,122.90 = 8,349.39/x
  3. Step 3: Cross multiply
    13,130.42x = 18,122.90 × 8,349.39
  4. Step 4: Simplify right side
    13,130.42x = 151,315,118.28
  5. Step 5: Solve for x
    x = 151,315,118.28/13,130.42
  6. Step 6: Final answer
    x = 11,524.02

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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.