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Finding the Fourth Proportional to 22,213, 30,655.86 and 12,278.92

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Solution

The fourth proportional to 22,213, 30,655.86 and 12,278.92 is: 16,945.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,213 : 30,655.86 = 12,278.92 : x
  2. Step 2: Convert to fraction form
    22,213/30,655.86 = 12,278.92/x
  3. Step 3: Cross multiply
    22,213x = 30,655.86 × 12,278.92
  4. Step 4: Simplify right side
    22,213x = 376,420,852.47
  5. Step 5: Solve for x
    x = 376,420,852.47/22,213
  6. Step 6: Final answer
    x = 16,945.97

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Double scale
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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.