Home / 15,789.72-21,881.97-15,567

Finding the Fourth Proportional to 15,789.72, 21,881.97 and 15,567

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Solution

The fourth proportional to 15,789.72, 21,881.97 and 15,567 is: 21,573.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.72 : 21,881.97 = 15,567 : x
  2. Step 2: Convert to fraction form
    15,789.72/21,881.97 = 15,567/x
  3. Step 3: Cross multiply
    15,789.72x = 21,881.97 × 15,567
  4. Step 4: Simplify right side
    15,789.72x = 340,636,626.99
  5. Step 5: Solve for x
    x = 340,636,626.99/15,789.72
  6. Step 6: Final answer
    x = 21,573.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.