Home / 15,861.83-21,928.32-15,712.38

Finding the Fourth Proportional to 15,861.83, 21,928.32 and 15,712.38

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Solution

The fourth proportional to 15,861.83, 21,928.32 and 15,712.38 is: 21,721.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,861.83 : 21,928.32 = 15,712.38 : x
  2. Step 2: Convert to fraction form
    15,861.83/21,928.32 = 15,712.38/x
  3. Step 3: Cross multiply
    15,861.83x = 21,928.32 × 15,712.38
  4. Step 4: Simplify right side
    15,861.83x = 344,546,096.60
  5. Step 5: Solve for x
    x = 344,546,096.60/15,861.83
  6. Step 6: Final answer
    x = 21,721.72

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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.