Home / 15,717.68-21,690.52-8,644.36

Finding the Fourth Proportional to 15,717.68, 21,690.52 and 8,644.36

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Solution

The fourth proportional to 15,717.68, 21,690.52 and 8,644.36 is: 11,929.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.68 : 21,690.52 = 8,644.36 : x
  2. Step 2: Convert to fraction form
    15,717.68/21,690.52 = 8,644.36/x
  3. Step 3: Cross multiply
    15,717.68x = 21,690.52 × 8,644.36
  4. Step 4: Simplify right side
    15,717.68x = 187,500,663.47
  5. Step 5: Solve for x
    x = 187,500,663.47/15,717.68
  6. Step 6: Final answer
    x = 11,929.28

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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.