Home / 19,311.78-28,964.16-10,422.96

Finding the Fourth Proportional to 19,311.78, 28,964.16 and 10,422.96

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Solution

The fourth proportional to 19,311.78, 28,964.16 and 10,422.96 is: 15,632.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,311.78 : 28,964.16 = 10,422.96 : x
  2. Step 2: Convert to fraction form
    19,311.78/28,964.16 = 10,422.96/x
  3. Step 3: Cross multiply
    19,311.78x = 28,964.16 × 10,422.96
  4. Step 4: Simplify right side
    19,311.78x = 301,892,281.11
  5. Step 5: Solve for x
    x = 301,892,281.11/19,311.78
  6. Step 6: Final answer
    x = 15,632.55

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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.