Home / 31,737.61-43,778.07-20,421.84

Finding the Fourth Proportional to 31,737.61, 43,778.07 and 20,421.84

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Solution

The fourth proportional to 31,737.61, 43,778.07 and 20,421.84 is: 28,169.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,737.61 : 43,778.07 = 20,421.84 : x
  2. Step 2: Convert to fraction form
    31,737.61/43,778.07 = 20,421.84/x
  3. Step 3: Cross multiply
    31,737.61x = 43,778.07 × 20,421.84
  4. Step 4: Simplify right side
    31,737.61x = 894,028,741.05
  5. Step 5: Solve for x
    x = 894,028,741.05/31,737.61
  6. Step 6: Final answer
    x = 28,169.38

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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.