Home / 13,151.08-18,147.79-7,181.58

Finding the Fourth Proportional to 13,151.08, 18,147.79 and 7,181.58

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Solution

The fourth proportional to 13,151.08, 18,147.79 and 7,181.58 is: 9,910.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,151.08 : 18,147.79 = 7,181.58 : x
  2. Step 2: Convert to fraction form
    13,151.08/18,147.79 = 7,181.58/x
  3. Step 3: Cross multiply
    13,151.08x = 18,147.79 × 7,181.58
  4. Step 4: Simplify right side
    13,151.08x = 130,329,805.71
  5. Step 5: Solve for x
    x = 130,329,805.71/13,151.08
  6. Step 6: Final answer
    x = 9,910.20

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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.