Home / 28,860.50-39,828.11-15,939.71

Finding the Fourth Proportional to 28,860.50, 39,828.11 and 15,939.71

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Solution

The fourth proportional to 28,860.50, 39,828.11 and 15,939.71 is: 21,997.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,860.50 : 39,828.11 = 15,939.71 : x
  2. Step 2: Convert to fraction form
    28,860.50/39,828.11 = 15,939.71/x
  3. Step 3: Cross multiply
    28,860.50x = 39,828.11 × 15,939.71
  4. Step 4: Simplify right side
    28,860.50x = 634,848,443.55
  5. Step 5: Solve for x
    x = 634,848,443.55/28,860.50
  6. Step 6: Final answer
    x = 21,997.14

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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.