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Finding the Fourth Proportional to 21,641.86, 29,867.16 and 12,210.22

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Solution

The fourth proportional to 21,641.86, 29,867.16 and 12,210.22 is: 16,850.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,641.86 : 29,867.16 = 12,210.22 : x
  2. Step 2: Convert to fraction form
    21,641.86/29,867.16 = 12,210.22/x
  3. Step 3: Cross multiply
    21,641.86x = 29,867.16 × 12,210.22
  4. Step 4: Simplify right side
    21,641.86x = 364,684,594.38
  5. Step 5: Solve for x
    x = 364,684,594.38/21,641.86
  6. Step 6: Final answer
    x = 16,850.89

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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.