Home / 15,717.14-21,690.21-8,644.10

Finding the Fourth Proportional to 15,717.14, 21,690.21 and 8,644.10

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Solution

The fourth proportional to 15,717.14, 21,690.21 and 8,644.10 is: 11,929.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.14 : 21,690.21 = 8,644.10 : x
  2. Step 2: Convert to fraction form
    15,717.14/21,690.21 = 8,644.10/x
  3. Step 3: Cross multiply
    15,717.14x = 21,690.21 × 8,644.10
  4. Step 4: Simplify right side
    15,717.14x = 187,492,344.26
  5. Step 5: Solve for x
    x = 187,492,344.26/15,717.14
  6. Step 6: Final answer
    x = 11,929.16

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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.