Home / 13,521.39-18,665.27-8,217.91

Finding the Fourth Proportional to 13,521.39, 18,665.27 and 8,217.91

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Solution

The fourth proportional to 13,521.39, 18,665.27 and 8,217.91 is: 11,344.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.39 : 18,665.27 = 8,217.91 : x
  2. Step 2: Convert to fraction form
    13,521.39/18,665.27 = 8,217.91/x
  3. Step 3: Cross multiply
    13,521.39x = 18,665.27 × 8,217.91
  4. Step 4: Simplify right side
    13,521.39x = 153,389,508.99
  5. Step 5: Solve for x
    x = 153,389,508.99/13,521.39
  6. Step 6: Final answer
    x = 11,344.21

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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.