Home / 28,515.11-39,349.25-15,767.55

Finding the Fourth Proportional to 28,515.11, 39,349.25 and 15,767.55

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Solution

The fourth proportional to 28,515.11, 39,349.25 and 15,767.55 is: 21,758.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.11 : 39,349.25 = 15,767.55 : x
  2. Step 2: Convert to fraction form
    28,515.11/39,349.25 = 15,767.55/x
  3. Step 3: Cross multiply
    28,515.11x = 39,349.25 × 15,767.55
  4. Step 4: Simplify right side
    28,515.11x = 620,441,266.84
  5. Step 5: Solve for x
    x = 620,441,266.84/28,515.11
  6. Step 6: Final answer
    x = 21,758.33

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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.