Home / 13,125.89-19,781.24-11,878.16

Finding the Fourth Proportional to 13,125.89, 19,781.24 and 11,878.16

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Solution

The fourth proportional to 13,125.89, 19,781.24 and 11,878.16 is: 17,900.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.89 : 19,781.24 = 11,878.16 : x
  2. Step 2: Convert to fraction form
    13,125.89/19,781.24 = 11,878.16/x
  3. Step 3: Cross multiply
    13,125.89x = 19,781.24 × 11,878.16
  4. Step 4: Simplify right side
    13,125.89x = 234,964,575.42
  5. Step 5: Solve for x
    x = 234,964,575.42/13,125.89
  6. Step 6: Final answer
    x = 17,900.85

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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.