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Finding the Fourth Proportional to 13,590.85, 18,756.18 and 7,622.85

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Solution

The fourth proportional to 13,590.85, 18,756.18 and 7,622.85 is: 10,519.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,590.85 : 18,756.18 = 7,622.85 : x
  2. Step 2: Convert to fraction form
    13,590.85/18,756.18 = 7,622.85/x
  3. Step 3: Cross multiply
    13,590.85x = 18,756.18 × 7,622.85
  4. Step 4: Simplify right side
    13,590.85x = 142,975,546.71
  5. Step 5: Solve for x
    x = 142,975,546.71/13,590.85
  6. Step 6: Final answer
    x = 10,519.99

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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.