Home / 21,781.04-30,064.68-12,827.92

Finding the Fourth Proportional to 21,781.04, 30,064.68 and 12,827.92

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Solution

The fourth proportional to 21,781.04, 30,064.68 and 12,827.92 is: 17,706.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.04 : 30,064.68 = 12,827.92 : x
  2. Step 2: Convert to fraction form
    21,781.04/30,064.68 = 12,827.92/x
  3. Step 3: Cross multiply
    21,781.04x = 30,064.68 × 12,827.92
  4. Step 4: Simplify right side
    21,781.04x = 385,667,309.87
  5. Step 5: Solve for x
    x = 385,667,309.87/21,781.04
  6. Step 6: Final answer
    x = 17,706.56

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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.