Home / 18,971.84-28,434.72-13,426.80

Finding the Fourth Proportional to 18,971.84, 28,434.72 and 13,426.80

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Solution

The fourth proportional to 18,971.84, 28,434.72 and 13,426.80 is: 20,123.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,971.84 : 28,434.72 = 13,426.80 : x
  2. Step 2: Convert to fraction form
    18,971.84/28,434.72 = 13,426.80/x
  3. Step 3: Cross multiply
    18,971.84x = 28,434.72 × 13,426.80
  4. Step 4: Simplify right side
    18,971.84x = 381,787,298.50
  5. Step 5: Solve for x
    x = 381,787,298.50/18,971.84
  6. Step 6: Final answer
    x = 20,123.89

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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.