Home / 15,694.32-21,658.68-8,621.40

Finding the Fourth Proportional to 15,694.32, 21,658.68 and 8,621.40

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Solution

The fourth proportional to 15,694.32, 21,658.68 and 8,621.40 is: 11,897.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,694.32 : 21,658.68 = 8,621.40 : x
  2. Step 2: Convert to fraction form
    15,694.32/21,658.68 = 8,621.40/x
  3. Step 3: Cross multiply
    15,694.32x = 21,658.68 × 8,621.40
  4. Step 4: Simplify right side
    15,694.32x = 186,728,143.75
  5. Step 5: Solve for x
    x = 186,728,143.75/15,694.32
  6. Step 6: Final answer
    x = 11,897.82

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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.