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Finding the Fourth Proportional to 13,590.99, 20,459.99 and 9,722.43

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Solution

The fourth proportional to 13,590.99, 20,459.99 and 9,722.43 is: 14,636.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,590.99 : 20,459.99 = 9,722.43 : x
  2. Step 2: Convert to fraction form
    13,590.99/20,459.99 = 9,722.43/x
  3. Step 3: Cross multiply
    13,590.99x = 20,459.99 × 9,722.43
  4. Step 4: Simplify right side
    13,590.99x = 198,920,844.88
  5. Step 5: Solve for x
    x = 198,920,844.88/13,590.99
  6. Step 6: Final answer
    x = 14,636.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.