Home / 15,722.31-21,696.48-8,648.58

Finding the Fourth Proportional to 15,722.31, 21,696.48 and 8,648.58

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Solution

The fourth proportional to 15,722.31, 21,696.48 and 8,648.58 is: 11,934.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,722.31 : 21,696.48 = 8,648.58 : x
  2. Step 2: Convert to fraction form
    15,722.31/21,696.48 = 8,648.58/x
  3. Step 3: Cross multiply
    15,722.31x = 21,696.48 × 8,648.58
  4. Step 4: Simplify right side
    15,722.31x = 187,643,743.00
  5. Step 5: Solve for x
    x = 187,643,743.00/15,722.31
  6. Step 6: Final answer
    x = 11,934.87

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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.