Home / 18,748.40-28,123.11-8,213

Finding the Fourth Proportional to 18,748.40, 28,123.11 and 8,213

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Solution

The fourth proportional to 18,748.40, 28,123.11 and 8,213 is: 12,319.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,748.40 : 28,123.11 = 8,213 : x
  2. Step 2: Convert to fraction form
    18,748.40/28,123.11 = 8,213/x
  3. Step 3: Cross multiply
    18,748.40x = 28,123.11 × 8,213
  4. Step 4: Simplify right side
    18,748.40x = 230,975,061.37
  5. Step 5: Solve for x
    x = 230,975,061.37/18,748.40
  6. Step 6: Final answer
    x = 12,319.72

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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.