Home / 15,217.32-21,000.52-8,505.12

Finding the Fourth Proportional to 15,217.32, 21,000.52 and 8,505.12

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Solution

The fourth proportional to 15,217.32, 21,000.52 and 8,505.12 is: 11,737.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,217.32 : 21,000.52 = 8,505.12 : x
  2. Step 2: Convert to fraction form
    15,217.32/21,000.52 = 8,505.12/x
  3. Step 3: Cross multiply
    15,217.32x = 21,000.52 × 8,505.12
  4. Step 4: Simplify right side
    15,217.32x = 178,611,942.66
  5. Step 5: Solve for x
    x = 178,611,942.66/15,217.32
  6. Step 6: Final answer
    x = 11,737.41

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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.