Home / 28,429.57-39,230.08-15,855.13

Finding the Fourth Proportional to 28,429.57, 39,230.08 and 15,855.13

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Solution

The fourth proportional to 28,429.57, 39,230.08 and 15,855.13 is: 21,878.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,429.57 : 39,230.08 = 15,855.13 : x
  2. Step 2: Convert to fraction form
    28,429.57/39,230.08 = 15,855.13/x
  3. Step 3: Cross multiply
    28,429.57x = 39,230.08 × 15,855.13
  4. Step 4: Simplify right side
    28,429.57x = 621,998,018.31
  5. Step 5: Solve for x
    x = 621,998,018.31/28,429.57
  6. Step 6: Final answer
    x = 21,878.56

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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.