Home / 15,345.63-21,175.56-8,631.54

Finding the Fourth Proportional to 15,345.63, 21,175.56 and 8,631.54

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Solution

The fourth proportional to 15,345.63, 21,175.56 and 8,631.54 is: 11,910.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,345.63 : 21,175.56 = 8,631.54 : x
  2. Step 2: Convert to fraction form
    15,345.63/21,175.56 = 8,631.54/x
  3. Step 3: Cross multiply
    15,345.63x = 21,175.56 × 8,631.54
  4. Step 4: Simplify right side
    15,345.63x = 182,777,693.16
  5. Step 5: Solve for x
    x = 182,777,693.16/15,345.63
  6. Step 6: Final answer
    x = 11,910.73

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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.