Home / 28,213.25-38,937.12-15,640.43

Finding the Fourth Proportional to 28,213.25, 38,937.12 and 15,640.43

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Solution

The fourth proportional to 28,213.25, 38,937.12 and 15,640.43 is: 21,585.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,213.25 : 38,937.12 = 15,640.43 : x
  2. Step 2: Convert to fraction form
    28,213.25/38,937.12 = 15,640.43/x
  3. Step 3: Cross multiply
    28,213.25x = 38,937.12 × 15,640.43
  4. Step 4: Simplify right side
    28,213.25x = 608,993,299.76
  5. Step 5: Solve for x
    x = 608,993,299.76/28,213.25
  6. Step 6: Final answer
    x = 21,585.37

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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.