Home / 28,115.41-38,800.86-15,369.78

Finding the Fourth Proportional to 28,115.41, 38,800.86 and 15,369.78

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Solution

The fourth proportional to 28,115.41, 38,800.86 and 15,369.78 is: 21,211.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.41 : 38,800.86 = 15,369.78 : x
  2. Step 2: Convert to fraction form
    28,115.41/38,800.86 = 15,369.78/x
  3. Step 3: Cross multiply
    28,115.41x = 38,800.86 × 15,369.78
  4. Step 4: Simplify right side
    28,115.41x = 596,360,682.01
  5. Step 5: Solve for x
    x = 596,360,682.01/28,115.41
  6. Step 6: Final answer
    x = 21,211.17

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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.