Home / 13,318.18-18,378.75-7,349.77

Finding the Fourth Proportional to 13,318.18, 18,378.75 and 7,349.77

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Solution

The fourth proportional to 13,318.18, 18,378.75 and 7,349.77 is: 10,142.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.18 : 18,378.75 = 7,349.77 : x
  2. Step 2: Convert to fraction form
    13,318.18/18,378.75 = 7,349.77/x
  3. Step 3: Cross multiply
    13,318.18x = 18,378.75 × 7,349.77
  4. Step 4: Simplify right side
    13,318.18x = 135,079,585.39
  5. Step 5: Solve for x
    x = 135,079,585.39/13,318.18
  6. Step 6: Final answer
    x = 10,142.50

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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.