Home / 21,138.16-31,712.08-11,272.24

Finding the Fourth Proportional to 21,138.16, 31,712.08 and 11,272.24

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Solution

The fourth proportional to 21,138.16, 31,712.08 and 11,272.24 is: 16,910.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.16 : 31,712.08 = 11,272.24 : x
  2. Step 2: Convert to fraction form
    21,138.16/31,712.08 = 11,272.24/x
  3. Step 3: Cross multiply
    21,138.16x = 31,712.08 × 11,272.24
  4. Step 4: Simplify right side
    21,138.16x = 357,466,176.66
  5. Step 5: Solve for x
    x = 357,466,176.66/21,138.16
  6. Step 6: Final answer
    x = 16,910.94

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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.