Home / 15,691.75-21,654.69-8,521.67

Finding the Fourth Proportional to 15,691.75, 21,654.69 and 8,521.67

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Solution

The fourth proportional to 15,691.75, 21,654.69 and 8,521.67 is: 11,759.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.75 : 21,654.69 = 8,521.67 : x
  2. Step 2: Convert to fraction form
    15,691.75/21,654.69 = 8,521.67/x
  3. Step 3: Cross multiply
    15,691.75x = 21,654.69 × 8,521.67
  4. Step 4: Simplify right side
    15,691.75x = 184,534,176.27
  5. Step 5: Solve for x
    x = 184,534,176.27/15,691.75
  6. Step 6: Final answer
    x = 11,759.95

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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.