Home / 15,785.49-21,792.18-11,531.78

Finding the Fourth Proportional to 15,785.49, 21,792.18 and 11,531.78

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Solution

The fourth proportional to 15,785.49, 21,792.18 and 11,531.78 is: 15,919.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,785.49 : 21,792.18 = 11,531.78 : x
  2. Step 2: Convert to fraction form
    15,785.49/21,792.18 = 11,531.78/x
  3. Step 3: Cross multiply
    15,785.49x = 21,792.18 × 11,531.78
  4. Step 4: Simplify right side
    15,785.49x = 251,302,625.48
  5. Step 5: Solve for x
    x = 251,302,625.48/15,785.49
  6. Step 6: Final answer
    x = 15,919.85

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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.