Home / 15,717.32-21,690.48-8,644.40

Finding the Fourth Proportional to 15,717.32, 21,690.48 and 8,644.40

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Solution

The fourth proportional to 15,717.32, 21,690.48 and 8,644.40 is: 11,929.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.32 : 21,690.48 = 8,644.40 : x
  2. Step 2: Convert to fraction form
    15,717.32/21,690.48 = 8,644.40/x
  3. Step 3: Cross multiply
    15,717.32x = 21,690.48 × 8,644.40
  4. Step 4: Simplify right side
    15,717.32x = 187,501,185.31
  5. Step 5: Solve for x
    x = 187,501,185.31/15,717.32
  6. Step 6: Final answer
    x = 11,929.59

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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.