Home / 28,337.55-39,105.25-15,591.21

Finding the Fourth Proportional to 28,337.55, 39,105.25 and 15,591.21

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Solution

The fourth proportional to 28,337.55, 39,105.25 and 15,591.21 is: 21,515.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,337.55 : 39,105.25 = 15,591.21 : x
  2. Step 2: Convert to fraction form
    28,337.55/39,105.25 = 15,591.21/x
  3. Step 3: Cross multiply
    28,337.55x = 39,105.25 × 15,591.21
  4. Step 4: Simplify right side
    28,337.55x = 609,698,164.85
  5. Step 5: Solve for x
    x = 609,698,164.85/28,337.55
  6. Step 6: Final answer
    x = 21,515.56

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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.