Home / 15,809.18-21,815.72-8,637.66

Finding the Fourth Proportional to 15,809.18, 21,815.72 and 8,637.66

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Solution

The fourth proportional to 15,809.18, 21,815.72 and 8,637.66 is: 11,919.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,809.18 : 21,815.72 = 8,637.66 : x
  2. Step 2: Convert to fraction form
    15,809.18/21,815.72 = 8,637.66/x
  3. Step 3: Cross multiply
    15,809.18x = 21,815.72 × 8,637.66
  4. Step 4: Simplify right side
    15,809.18x = 188,436,728.83
  5. Step 5: Solve for x
    x = 188,436,728.83/15,809.18
  6. Step 6: Final answer
    x = 11,919.45

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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.