Home / 21,898.11-30,219.38-11,826.55

Finding the Fourth Proportional to 21,898.11, 30,219.38 and 11,826.55

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Solution

The fourth proportional to 21,898.11, 30,219.38 and 11,826.55 is: 16,320.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,898.11 : 30,219.38 = 11,826.55 : x
  2. Step 2: Convert to fraction form
    21,898.11/30,219.38 = 11,826.55/x
  3. Step 3: Cross multiply
    21,898.11x = 30,219.38 × 11,826.55
  4. Step 4: Simplify right side
    21,898.11x = 357,391,064.79
  5. Step 5: Solve for x
    x = 357,391,064.79/21,898.11
  6. Step 6: Final answer
    x = 16,320.64

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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.