Home / 31,136.68-42,974.11-18,389.00

Finding the Fourth Proportional to 31,136.68, 42,974.11 and 18,389.00

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Solution

The fourth proportional to 31,136.68, 42,974.11 and 18,389.00 is: 25,380.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,136.68 : 42,974.11 = 18,389.00 : x
  2. Step 2: Convert to fraction form
    31,136.68/42,974.11 = 18,389.00/x
  3. Step 3: Cross multiply
    31,136.68x = 42,974.11 × 18,389.00
  4. Step 4: Simplify right side
    31,136.68x = 790,251,039.21
  5. Step 5: Solve for x
    x = 790,251,039.21/31,136.68
  6. Step 6: Final answer
    x = 25,380.07

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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.