Home / 15,809.30-21,816.89-8,639.22

Finding the Fourth Proportional to 15,809.30, 21,816.89 and 8,639.22

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Solution

The fourth proportional to 15,809.30, 21,816.89 and 8,639.22 is: 11,922.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,809.30 : 21,816.89 = 8,639.22 : x
  2. Step 2: Convert to fraction form
    15,809.30/21,816.89 = 8,639.22/x
  3. Step 3: Cross multiply
    15,809.30x = 21,816.89 × 8,639.22
  4. Step 4: Simplify right side
    15,809.30x = 188,480,803.34
  5. Step 5: Solve for x
    x = 188,480,803.34/15,809.30
  6. Step 6: Final answer
    x = 11,922.15

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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.