Home / 15,519.31-21,416.01-8,445.76

Finding the Fourth Proportional to 15,519.31, 21,416.01 and 8,445.76

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Solution

The fourth proportional to 15,519.31, 21,416.01 and 8,445.76 is: 11,654.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,519.31 : 21,416.01 = 8,445.76 : x
  2. Step 2: Convert to fraction form
    15,519.31/21,416.01 = 8,445.76/x
  3. Step 3: Cross multiply
    15,519.31x = 21,416.01 × 8,445.76
  4. Step 4: Simplify right side
    15,519.31x = 180,874,480.62
  5. Step 5: Solve for x
    x = 180,874,480.62/15,519.31
  6. Step 6: Final answer
    x = 11,654.80

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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.