Home / 18,971.46-28,434.15-13,426.43

Finding the Fourth Proportional to 18,971.46, 28,434.15 and 13,426.43

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Solution

The fourth proportional to 18,971.46, 28,434.15 and 13,426.43 is: 20,123.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,971.46 : 28,434.15 = 13,426.43 : x
  2. Step 2: Convert to fraction form
    18,971.46/28,434.15 = 13,426.43/x
  3. Step 3: Cross multiply
    18,971.46x = 28,434.15 × 13,426.43
  4. Step 4: Simplify right side
    18,971.46x = 381,768,982.41
  5. Step 5: Solve for x
    x = 381,768,982.41/18,971.46
  6. Step 6: Final answer
    x = 20,123.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.