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Finding the Fourth Proportional to 21,808.88, 30,095.88 and 12,248.86

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Solution

The fourth proportional to 21,808.88, 30,095.88 and 12,248.86 is: 16,903.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,808.88 : 30,095.88 = 12,248.86 : x
  2. Step 2: Convert to fraction form
    21,808.88/30,095.88 = 12,248.86/x
  3. Step 3: Cross multiply
    21,808.88x = 30,095.88 × 12,248.86
  4. Step 4: Simplify right side
    21,808.88x = 368,640,220.70
  5. Step 5: Solve for x
    x = 368,640,220.70/21,808.88
  6. Step 6: Final answer
    x = 16,903.22

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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.