Home / 15,691.21-23,644.75-12,978.92

Finding the Fourth Proportional to 15,691.21, 23,644.75 and 12,978.92

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Solution

The fourth proportional to 15,691.21, 23,644.75 and 12,978.92 is: 19,557.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.21 : 23,644.75 = 12,978.92 : x
  2. Step 2: Convert to fraction form
    15,691.21/23,644.75 = 12,978.92/x
  3. Step 3: Cross multiply
    15,691.21x = 23,644.75 × 12,978.92
  4. Step 4: Simplify right side
    15,691.21x = 306,883,369.67
  5. Step 5: Solve for x
    x = 306,883,369.67/15,691.21
  6. Step 6: Final answer
    x = 19,557.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.