Home / 13,522.39-18,666.65-8,218.91

Finding the Fourth Proportional to 13,522.39, 18,666.65 and 8,218.91

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Solution

The fourth proportional to 13,522.39, 18,666.65 and 8,218.91 is: 11,345.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,522.39 : 18,666.65 = 8,218.91 : x
  2. Step 2: Convert to fraction form
    13,522.39/18,666.65 = 8,218.91/x
  3. Step 3: Cross multiply
    13,522.39x = 18,666.65 × 8,218.91
  4. Step 4: Simplify right side
    13,522.39x = 153,419,516.35
  5. Step 5: Solve for x
    x = 153,419,516.35/13,522.39
  6. Step 6: Final answer
    x = 11,345.59

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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.