Home / 21,228.23-31,807.49-12,910.65

Finding the Fourth Proportional to 21,228.23, 31,807.49 and 12,910.65

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Solution

The fourth proportional to 21,228.23, 31,807.49 and 12,910.65 is: 19,344.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.23 : 31,807.49 = 12,910.65 : x
  2. Step 2: Convert to fraction form
    21,228.23/31,807.49 = 12,910.65/x
  3. Step 3: Cross multiply
    21,228.23x = 31,807.49 × 12,910.65
  4. Step 4: Simplify right side
    21,228.23x = 410,655,306.22
  5. Step 5: Solve for x
    x = 410,655,306.22/21,228.23
  6. Step 6: Final answer
    x = 19,344.78

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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.