Home / 28,213.75-38,937.81-15,640.93

Finding the Fourth Proportional to 28,213.75, 38,937.81 and 15,640.93

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Solution

The fourth proportional to 28,213.75, 38,937.81 and 15,640.93 is: 21,586.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,213.75 : 38,937.81 = 15,640.93 : x
  2. Step 2: Convert to fraction form
    28,213.75/38,937.81 = 15,640.93/x
  3. Step 3: Cross multiply
    28,213.75x = 38,937.81 × 15,640.93
  4. Step 4: Simplify right side
    28,213.75x = 609,023,560.56
  5. Step 5: Solve for x
    x = 609,023,560.56/28,213.75
  6. Step 6: Final answer
    x = 21,586.06

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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.