Home / 15,717.48-21,689.31-8,644.56

Finding the Fourth Proportional to 15,717.48, 21,689.31 and 8,644.56

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Solution

The fourth proportional to 15,717.48, 21,689.31 and 8,644.56 is: 11,929.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.48 : 21,689.31 = 8,644.56 : x
  2. Step 2: Convert to fraction form
    15,717.48/21,689.31 = 8,644.56/x
  3. Step 3: Cross multiply
    15,717.48x = 21,689.31 × 8,644.56
  4. Step 4: Simplify right side
    15,717.48x = 187,494,541.65
  5. Step 5: Solve for x
    x = 187,494,541.65/15,717.48
  6. Step 6: Final answer
    x = 11,929.05

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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.