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Finding the Fourth Proportional to 15,031.58, 20,743.39 and 8,317.18

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Solution

The fourth proportional to 15,031.58, 20,743.39 and 8,317.18 is: 11,477.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,031.58 : 20,743.39 = 8,317.18 : x
  2. Step 2: Convert to fraction form
    15,031.58/20,743.39 = 8,317.18/x
  3. Step 3: Cross multiply
    15,031.58x = 20,743.39 × 8,317.18
  4. Step 4: Simplify right side
    15,031.58x = 172,526,544.77
  5. Step 5: Solve for x
    x = 172,526,544.77/15,031.58
  6. Step 6: Final answer
    x = 11,477.61

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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.