Home / 21,992.90-30,354.26-12,561.45

Finding the Fourth Proportional to 21,992.90, 30,354.26 and 12,561.45

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Solution

The fourth proportional to 21,992.90, 30,354.26 and 12,561.45 is: 17,337.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,992.90 : 30,354.26 = 12,561.45 : x
  2. Step 2: Convert to fraction form
    21,992.90/30,354.26 = 12,561.45/x
  3. Step 3: Cross multiply
    21,992.90x = 30,354.26 × 12,561.45
  4. Step 4: Simplify right side
    21,992.90x = 381,293,456.47
  5. Step 5: Solve for x
    x = 381,293,456.47/21,992.90
  6. Step 6: Final answer
    x = 17,337.12

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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.