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Finding the Fourth Proportional to 15,760.74, 21,749.53 and 8,590.73

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Solution

The fourth proportional to 15,760.74, 21,749.53 and 8,590.73 is: 11,855.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,760.74 : 21,749.53 = 8,590.73 : x
  2. Step 2: Convert to fraction form
    15,760.74/21,749.53 = 8,590.73/x
  3. Step 3: Cross multiply
    15,760.74x = 21,749.53 × 8,590.73
  4. Step 4: Simplify right side
    15,760.74x = 186,844,225.74
  5. Step 5: Solve for x
    x = 186,844,225.74/15,760.74
  6. Step 6: Final answer
    x = 11,855.04

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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.