Home / 13,680.28-18,878.76-7,392.64

Finding the Fourth Proportional to 13,680.28, 18,878.76 and 7,392.64

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Solution

The fourth proportional to 13,680.28, 18,878.76 and 7,392.64 is: 10,201.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.28 : 18,878.76 = 7,392.64 : x
  2. Step 2: Convert to fraction form
    13,680.28/18,878.76 = 7,392.64/x
  3. Step 3: Cross multiply
    13,680.28x = 18,878.76 × 7,392.64
  4. Step 4: Simplify right side
    13,680.28x = 139,563,876.33
  5. Step 5: Solve for x
    x = 139,563,876.33/13,680.28
  6. Step 6: Final answer
    x = 10,201.83

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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.