Home / 15,372.22-21,213.75-8,657.97

Finding the Fourth Proportional to 15,372.22, 21,213.75 and 8,657.97

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Solution

The fourth proportional to 15,372.22, 21,213.75 and 8,657.97 is: 11,948.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,372.22 : 21,213.75 = 8,657.97 : x
  2. Step 2: Convert to fraction form
    15,372.22/21,213.75 = 8,657.97/x
  3. Step 3: Cross multiply
    15,372.22x = 21,213.75 × 8,657.97
  4. Step 4: Simplify right side
    15,372.22x = 183,668,011.09
  5. Step 5: Solve for x
    x = 183,668,011.09/15,372.22
  6. Step 6: Final answer
    x = 11,948.05

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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.