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Finding the Fourth Proportional to 21,235.68, 29,305.80 and 12,283.92

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Solution

The fourth proportional to 21,235.68, 29,305.80 and 12,283.92 is: 16,952.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,235.68 : 29,305.80 = 12,283.92 : x
  2. Step 2: Convert to fraction form
    21,235.68/29,305.80 = 12,283.92/x
  3. Step 3: Cross multiply
    21,235.68x = 29,305.80 × 12,283.92
  4. Step 4: Simplify right side
    21,235.68x = 359,990,102.74
  5. Step 5: Solve for x
    x = 359,990,102.74/21,235.68
  6. Step 6: Final answer
    x = 16,952.13

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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.