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Finding the Fourth Proportional to 12,590.56, 17,358.92 and 7,873.12

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Solution

The fourth proportional to 12,590.56, 17,358.92 and 7,873.12 is: 10,854.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.56 : 17,358.92 = 7,873.12 : x
  2. Step 2: Convert to fraction form
    12,590.56/17,358.92 = 7,873.12/x
  3. Step 3: Cross multiply
    12,590.56x = 17,358.92 × 7,873.12
  4. Step 4: Simplify right side
    12,590.56x = 136,668,860.23
  5. Step 5: Solve for x
    x = 136,668,860.23/12,590.56
  6. Step 6: Final answer
    x = 10,854.87

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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.