Home / 13,356.18-18,431.20-7,387.70

Finding the Fourth Proportional to 13,356.18, 18,431.20 and 7,387.70

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Solution

The fourth proportional to 13,356.18, 18,431.20 and 7,387.70 is: 10,194.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.18 : 18,431.20 = 7,387.70 : x
  2. Step 2: Convert to fraction form
    13,356.18/18,431.20 = 7,387.70/x
  3. Step 3: Cross multiply
    13,356.18x = 18,431.20 × 7,387.70
  4. Step 4: Simplify right side
    13,356.18x = 136,164,176.24
  5. Step 5: Solve for x
    x = 136,164,176.24/13,356.18
  6. Step 6: Final answer
    x = 10,194.84

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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.