Home / 13,709.39-18,920.54-8,332.10

Finding the Fourth Proportional to 13,709.39, 18,920.54 and 8,332.10

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Solution

The fourth proportional to 13,709.39, 18,920.54 and 8,332.10 is: 11,499.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.39 : 18,920.54 = 8,332.10 : x
  2. Step 2: Convert to fraction form
    13,709.39/18,920.54 = 8,332.10/x
  3. Step 3: Cross multiply
    13,709.39x = 18,920.54 × 8,332.10
  4. Step 4: Simplify right side
    13,709.39x = 157,647,781.65
  5. Step 5: Solve for x
    x = 157,647,781.65/13,709.39
  6. Step 6: Final answer
    x = 11,499.26

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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.