Home / 15,380.72-21,225.78-8,666.58

Finding the Fourth Proportional to 15,380.72, 21,225.78 and 8,666.58

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Solution

The fourth proportional to 15,380.72, 21,225.78 and 8,666.58 is: 11,960.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,380.72 : 21,225.78 = 8,666.58 : x
  2. Step 2: Convert to fraction form
    15,380.72/21,225.78 = 8,666.58/x
  3. Step 3: Cross multiply
    15,380.72x = 21,225.78 × 8,666.58
  4. Step 4: Simplify right side
    15,380.72x = 183,954,920.43
  5. Step 5: Solve for x
    x = 183,954,920.43/15,380.72
  6. Step 6: Final answer
    x = 11,960.10

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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.