Home / 13,140.93-18,118.18-11,436.90

Finding the Fourth Proportional to 13,140.93, 18,118.18 and 11,436.90

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Solution

The fourth proportional to 13,140.93, 18,118.18 and 11,436.90 is: 15,768.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.93 : 18,118.18 = 11,436.90 : x
  2. Step 2: Convert to fraction form
    13,140.93/18,118.18 = 11,436.90/x
  3. Step 3: Cross multiply
    13,140.93x = 18,118.18 × 11,436.90
  4. Step 4: Simplify right side
    13,140.93x = 207,215,759.19
  5. Step 5: Solve for x
    x = 207,215,759.19/13,140.93
  6. Step 6: Final answer
    x = 15,768.72

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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.