Home / 12,955.28-19,438-10,479.60

Finding the Fourth Proportional to 12,955.28, 19,438 and 10,479.60

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Solution

The fourth proportional to 12,955.28, 19,438 and 10,479.60 is: 15,723.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,955.28 : 19,438 = 10,479.60 : x
  2. Step 2: Convert to fraction form
    12,955.28/19,438 = 10,479.60/x
  3. Step 3: Cross multiply
    12,955.28x = 19,438 × 10,479.60
  4. Step 4: Simplify right side
    12,955.28x = 203,702,464.80
  5. Step 5: Solve for x
    x = 203,702,464.80/12,955.28
  6. Step 6: Final answer
    x = 15,723.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.