Home / 28,902.75-39,885.80-15,654.75

Finding the Fourth Proportional to 28,902.75, 39,885.80 and 15,654.75

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Solution

The fourth proportional to 28,902.75, 39,885.80 and 15,654.75 is: 21,603.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,902.75 : 39,885.80 = 15,654.75 : x
  2. Step 2: Convert to fraction form
    28,902.75/39,885.80 = 15,654.75/x
  3. Step 3: Cross multiply
    28,902.75x = 39,885.80 × 15,654.75
  4. Step 4: Simplify right side
    28,902.75x = 624,402,149.28
  5. Step 5: Solve for x
    x = 624,402,149.28/28,902.75
  6. Step 6: Final answer
    x = 21,603.56

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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.