Home / 28,064.93-38,728.38-15,317.79

Finding the Fourth Proportional to 28,064.93, 38,728.38 and 15,317.79

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Solution

The fourth proportional to 28,064.93, 38,728.38 and 15,317.79 is: 21,137.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,064.93 : 38,728.38 = 15,317.79 : x
  2. Step 2: Convert to fraction form
    28,064.93/38,728.38 = 15,317.79/x
  3. Step 3: Cross multiply
    28,064.93x = 38,728.38 × 15,317.79
  4. Step 4: Simplify right side
    28,064.93x = 593,233,191.88
  5. Step 5: Solve for x
    x = 593,233,191.88/28,064.93
  6. Step 6: Final answer
    x = 21,137.88

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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.