Home / 15,349.78-21,184.57-8,635.69

Finding the Fourth Proportional to 15,349.78, 21,184.57 and 8,635.69

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Solution

The fourth proportional to 15,349.78, 21,184.57 and 8,635.69 is: 11,918.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,349.78 : 21,184.57 = 8,635.69 : x
  2. Step 2: Convert to fraction form
    15,349.78/21,184.57 = 8,635.69/x
  3. Step 3: Cross multiply
    15,349.78x = 21,184.57 × 8,635.69
  4. Step 4: Simplify right side
    15,349.78x = 182,943,379.30
  5. Step 5: Solve for x
    x = 182,943,379.30/15,349.78
  6. Step 6: Final answer
    x = 11,918.31

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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.