Home / 13,349.12-18,421.66-7,380.76

Finding the Fourth Proportional to 13,349.12, 18,421.66 and 7,380.76

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Solution

The fourth proportional to 13,349.12, 18,421.66 and 7,380.76 is: 10,185.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,349.12 : 18,421.66 = 7,380.76 : x
  2. Step 2: Convert to fraction form
    13,349.12/18,421.66 = 7,380.76/x
  3. Step 3: Cross multiply
    13,349.12x = 18,421.66 × 7,380.76
  4. Step 4: Simplify right side
    13,349.12x = 135,965,851.26
  5. Step 5: Solve for x
    x = 135,965,851.26/13,349.12
  6. Step 6: Final answer
    x = 10,185.38

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Half scale
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Double scale
Find fourth proportional to 13,350.12, 18,423.04 and 7,381.76
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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.