Home / 15,221.30-21,005.31-8,506.92

Finding the Fourth Proportional to 15,221.30, 21,005.31 and 8,506.92

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Solution

The fourth proportional to 15,221.30, 21,005.31 and 8,506.92 is: 11,739.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.30 : 21,005.31 = 8,506.92 : x
  2. Step 2: Convert to fraction form
    15,221.30/21,005.31 = 8,506.92/x
  3. Step 3: Cross multiply
    15,221.30x = 21,005.31 × 8,506.92
  4. Step 4: Simplify right side
    15,221.30x = 178,690,386.72
  5. Step 5: Solve for x
    x = 178,690,386.72/15,221.30
  6. Step 6: Final answer
    x = 11,739.50

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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.