Home / 21,681.18-29,920.61-12,249.54

Finding the Fourth Proportional to 21,681.18, 29,920.61 and 12,249.54

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Solution

The fourth proportional to 21,681.18, 29,920.61 and 12,249.54 is: 16,904.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.18 : 29,920.61 = 12,249.54 : x
  2. Step 2: Convert to fraction form
    21,681.18/29,920.61 = 12,249.54/x
  3. Step 3: Cross multiply
    21,681.18x = 29,920.61 × 12,249.54
  4. Step 4: Simplify right side
    21,681.18x = 366,513,498.17
  5. Step 5: Solve for x
    x = 366,513,498.17/21,681.18
  6. Step 6: Final answer
    x = 16,904.69

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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.