Home / 28,239.57-38,971.33-15,493.30

Finding the Fourth Proportional to 28,239.57, 38,971.33 and 15,493.30

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Solution

The fourth proportional to 28,239.57, 38,971.33 and 15,493.30 is: 21,381.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.57 : 38,971.33 = 15,493.30 : x
  2. Step 2: Convert to fraction form
    28,239.57/38,971.33 = 15,493.30/x
  3. Step 3: Cross multiply
    28,239.57x = 38,971.33 × 15,493.30
  4. Step 4: Simplify right side
    28,239.57x = 603,794,370.93
  5. Step 5: Solve for x
    x = 603,794,370.93/28,239.57
  6. Step 6: Final answer
    x = 21,381.15

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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.