Home / 15,789.30-21,815.93-12,218.82

Finding the Fourth Proportional to 15,789.30, 21,815.93 and 12,218.82

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Solution

The fourth proportional to 15,789.30, 21,815.93 and 12,218.82 is: 16,882.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.30 : 21,815.93 = 12,218.82 : x
  2. Step 2: Convert to fraction form
    15,789.30/21,815.93 = 12,218.82/x
  3. Step 3: Cross multiply
    15,789.30x = 21,815.93 × 12,218.82
  4. Step 4: Simplify right side
    15,789.30x = 266,564,860.71
  5. Step 5: Solve for x
    x = 266,564,860.71/15,789.30
  6. Step 6: Final answer
    x = 16,882.63

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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.