Home / 28,487.90-39,311.26-15,740.93

Finding the Fourth Proportional to 28,487.90, 39,311.26 and 15,740.93

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Solution

The fourth proportional to 28,487.90, 39,311.26 and 15,740.93 is: 21,721.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.90 : 39,311.26 = 15,740.93 : x
  2. Step 2: Convert to fraction form
    28,487.90/39,311.26 = 15,740.93/x
  3. Step 3: Cross multiply
    28,487.90x = 39,311.26 × 15,740.93
  4. Step 4: Simplify right side
    28,487.90x = 618,795,850.80
  5. Step 5: Solve for x
    x = 618,795,850.80/28,487.90
  6. Step 6: Final answer
    x = 21,721.36

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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.