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Finding the Fourth Proportional to 17,613.80, 26,420.70 and 9,421.80

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Solution

The fourth proportional to 17,613.80, 26,420.70 and 9,421.80 is: 14,132.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,613.80 : 26,420.70 = 9,421.80 : x
  2. Step 2: Convert to fraction form
    17,613.80/26,420.70 = 9,421.80/x
  3. Step 3: Cross multiply
    17,613.80x = 26,420.70 × 9,421.80
  4. Step 4: Simplify right side
    17,613.80x = 248,930,551.26
  5. Step 5: Solve for x
    x = 248,930,551.26/17,613.80
  6. Step 6: Final answer
    x = 14,132.70

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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.