Home / 31,606.61-43,611.41-20,422.13

Finding the Fourth Proportional to 31,606.61, 43,611.41 and 20,422.13

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Solution

The fourth proportional to 31,606.61, 43,611.41 and 20,422.13 is: 28,178.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,606.61 : 43,611.41 = 20,422.13 : x
  2. Step 2: Convert to fraction form
    31,606.61/43,611.41 = 20,422.13/x
  3. Step 3: Cross multiply
    31,606.61x = 43,611.41 × 20,422.13
  4. Step 4: Simplify right side
    31,606.61x = 890,637,717.50
  5. Step 5: Solve for x
    x = 890,637,717.50/31,606.61
  6. Step 6: Final answer
    x = 28,178.85

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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.