Home / 21,113.91-31,661.55-11,251.08

Finding the Fourth Proportional to 21,113.91, 31,661.55 and 11,251.08

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Solution

The fourth proportional to 21,113.91, 31,661.55 and 11,251.08 is: 16,871.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.91 : 31,661.55 = 11,251.08 : x
  2. Step 2: Convert to fraction form
    21,113.91/31,661.55 = 11,251.08/x
  3. Step 3: Cross multiply
    21,113.91x = 31,661.55 × 11,251.08
  4. Step 4: Simplify right side
    21,113.91x = 356,226,631.97
  5. Step 5: Solve for x
    x = 356,226,631.97/21,113.91
  6. Step 6: Final answer
    x = 16,871.66

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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.