Home / 28,815.38-39,765.23-15,567.38

Finding the Fourth Proportional to 28,815.38, 39,765.23 and 15,567.38

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Solution

The fourth proportional to 28,815.38, 39,765.23 and 15,567.38 is: 21,482.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,815.38 : 39,765.23 = 15,567.38 : x
  2. Step 2: Convert to fraction form
    28,815.38/39,765.23 = 15,567.38/x
  3. Step 3: Cross multiply
    28,815.38x = 39,765.23 × 15,567.38
  4. Step 4: Simplify right side
    28,815.38x = 619,040,169.53
  5. Step 5: Solve for x
    x = 619,040,169.53/28,815.38
  6. Step 6: Final answer
    x = 21,482.98

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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.