Home / 15,718.44-21,690.95-8,644.81

Finding the Fourth Proportional to 15,718.44, 21,690.95 and 8,644.81

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Solution

The fourth proportional to 15,718.44, 21,690.95 and 8,644.81 is: 11,929.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.44 : 21,690.95 = 8,644.81 : x
  2. Step 2: Convert to fraction form
    15,718.44/21,690.95 = 8,644.81/x
  3. Step 3: Cross multiply
    15,718.44x = 21,690.95 × 8,644.81
  4. Step 4: Simplify right side
    15,718.44x = 187,514,141.47
  5. Step 5: Solve for x
    x = 187,514,141.47/15,718.44
  6. Step 6: Final answer
    x = 11,929.56

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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.