Home / 28,008.78-38,651.28-15,433.56

Finding the Fourth Proportional to 28,008.78, 38,651.28 and 15,433.56

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Solution

The fourth proportional to 28,008.78, 38,651.28 and 15,433.56 is: 21,297.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,008.78 : 38,651.28 = 15,433.56 : x
  2. Step 2: Convert to fraction form
    28,008.78/38,651.28 = 15,433.56/x
  3. Step 3: Cross multiply
    28,008.78x = 38,651.28 × 15,433.56
  4. Step 4: Simplify right side
    28,008.78x = 596,526,848.96
  5. Step 5: Solve for x
    x = 596,526,848.96/28,008.78
  6. Step 6: Final answer
    x = 21,297.85

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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.