Home / 21,304.35-29,390.73-12,685.71

Finding the Fourth Proportional to 21,304.35, 29,390.73 and 12,685.71

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Solution

The fourth proportional to 21,304.35, 29,390.73 and 12,685.71 is: 17,500.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,304.35 : 29,390.73 = 12,685.71 : x
  2. Step 2: Convert to fraction form
    21,304.35/29,390.73 = 12,685.71/x
  3. Step 3: Cross multiply
    21,304.35x = 29,390.73 × 12,685.71
  4. Step 4: Simplify right side
    21,304.35x = 372,842,277.47
  5. Step 5: Solve for x
    x = 372,842,277.47/21,304.35
  6. Step 6: Final answer
    x = 17,500.76

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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.