Home / 13,130.39-18,122.87-8,349.41

Finding the Fourth Proportional to 13,130.39, 18,122.87 and 8,349.41

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Solution

The fourth proportional to 13,130.39, 18,122.87 and 8,349.41 is: 11,524.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.39 : 18,122.87 = 8,349.41 : x
  2. Step 2: Convert to fraction form
    13,130.39/18,122.87 = 8,349.41/x
  3. Step 3: Cross multiply
    13,130.39x = 18,122.87 × 8,349.41
  4. Step 4: Simplify right side
    13,130.39x = 151,315,338.19
  5. Step 5: Solve for x
    x = 151,315,338.19/13,130.39
  6. Step 6: Final answer
    x = 11,524.05

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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.