Home / 18,826.72-28,249.40-13,315.48

Finding the Fourth Proportional to 18,826.72, 28,249.40 and 13,315.48

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Solution

The fourth proportional to 18,826.72, 28,249.40 and 13,315.48 is: 19,979.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,826.72 : 28,249.40 = 13,315.48 : x
  2. Step 2: Convert to fraction form
    18,826.72/28,249.40 = 13,315.48/x
  3. Step 3: Cross multiply
    18,826.72x = 28,249.40 × 13,315.48
  4. Step 4: Simplify right side
    18,826.72x = 376,154,320.71
  5. Step 5: Solve for x
    x = 376,154,320.71/18,826.72
  6. Step 6: Final answer
    x = 19,979.81

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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.