Home / 15,887.35-21,880.15-15,542.97

Finding the Fourth Proportional to 15,887.35, 21,880.15 and 15,542.97

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Solution

The fourth proportional to 15,887.35, 21,880.15 and 15,542.97 is: 21,405.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,887.35 : 21,880.15 = 15,542.97 : x
  2. Step 2: Convert to fraction form
    15,887.35/21,880.15 = 15,542.97/x
  3. Step 3: Cross multiply
    15,887.35x = 21,880.15 × 15,542.97
  4. Step 4: Simplify right side
    15,887.35x = 340,082,515.05
  5. Step 5: Solve for x
    x = 340,082,515.05/15,887.35
  6. Step 6: Final answer
    x = 21,405.87

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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.