Home / 21,618.62-29,829.13-13,125.21

Finding the Fourth Proportional to 21,618.62, 29,829.13 and 13,125.21

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Solution

The fourth proportional to 21,618.62, 29,829.13 and 13,125.21 is: 18,110.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.62 : 29,829.13 = 13,125.21 : x
  2. Step 2: Convert to fraction form
    21,618.62/29,829.13 = 13,125.21/x
  3. Step 3: Cross multiply
    21,618.62x = 29,829.13 × 13,125.21
  4. Step 4: Simplify right side
    21,618.62x = 391,513,595.37
  5. Step 5: Solve for x
    x = 391,513,595.37/21,618.62
  6. Step 6: Final answer
    x = 18,110.02

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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.