Home / 15,421.70-21,282.11-8,348.27

Finding the Fourth Proportional to 15,421.70, 21,282.11 and 8,348.27

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Solution

The fourth proportional to 15,421.70, 21,282.11 and 8,348.27 is: 11,520.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.70 : 21,282.11 = 8,348.27 : x
  2. Step 2: Convert to fraction form
    15,421.70/21,282.11 = 8,348.27/x
  3. Step 3: Cross multiply
    15,421.70x = 21,282.11 × 8,348.27
  4. Step 4: Simplify right side
    15,421.70x = 177,668,652.30
  5. Step 5: Solve for x
    x = 177,668,652.30/15,421.70
  6. Step 6: Final answer
    x = 11,520.70

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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.