Home / 28,145.87-38,840.99-15,399.31

Finding the Fourth Proportional to 28,145.87, 38,840.99 and 15,399.31

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Solution

The fourth proportional to 28,145.87, 38,840.99 and 15,399.31 is: 21,250.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.87 : 38,840.99 = 15,399.31 : x
  2. Step 2: Convert to fraction form
    28,145.87/38,840.99 = 15,399.31/x
  3. Step 3: Cross multiply
    28,145.87x = 38,840.99 × 15,399.31
  4. Step 4: Simplify right side
    28,145.87x = 598,124,387.11
  5. Step 5: Solve for x
    x = 598,124,387.11/28,145.87
  6. Step 6: Final answer
    x = 21,250.87

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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.