Home / 21,544.11-29,721.74-13,155.75

Finding the Fourth Proportional to 21,544.11, 29,721.74 and 13,155.75

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Solution

The fourth proportional to 21,544.11, 29,721.74 and 13,155.75 is: 18,149.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,544.11 : 29,721.74 = 13,155.75 : x
  2. Step 2: Convert to fraction form
    21,544.11/29,721.74 = 13,155.75/x
  3. Step 3: Cross multiply
    21,544.11x = 29,721.74 × 13,155.75
  4. Step 4: Simplify right side
    21,544.11x = 391,011,715.23
  5. Step 5: Solve for x
    x = 391,011,715.23/21,544.11
  6. Step 6: Final answer
    x = 18,149.36

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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.