Home / 15,345.26-21,177.09-8,631.20

Finding the Fourth Proportional to 15,345.26, 21,177.09 and 8,631.20

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Solution

The fourth proportional to 15,345.26, 21,177.09 and 8,631.20 is: 11,911.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,345.26 : 21,177.09 = 8,631.20 : x
  2. Step 2: Convert to fraction form
    15,345.26/21,177.09 = 8,631.20/x
  3. Step 3: Cross multiply
    15,345.26x = 21,177.09 × 8,631.20
  4. Step 4: Simplify right side
    15,345.26x = 182,783,699.21
  5. Step 5: Solve for x
    x = 182,783,699.21/15,345.26
  6. Step 6: Final answer
    x = 11,911.41

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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.