Home / 21,027.12-31,472.64-15,479.28

Finding the Fourth Proportional to 21,027.12, 31,472.64 and 15,479.28

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Solution

The fourth proportional to 21,027.12, 31,472.64 and 15,479.28 is: 23,168.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.12 : 31,472.64 = 15,479.28 : x
  2. Step 2: Convert to fraction form
    21,027.12/31,472.64 = 15,479.28/x
  3. Step 3: Cross multiply
    21,027.12x = 31,472.64 × 15,479.28
  4. Step 4: Simplify right side
    21,027.12x = 487,173,806.90
  5. Step 5: Solve for x
    x = 487,173,806.90/21,027.12
  6. Step 6: Final answer
    x = 23,168.83

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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.