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Finding the Fourth Proportional to 15,197.18, 20,972.86 and 8,482.68

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Solution

The fourth proportional to 15,197.18, 20,972.86 and 8,482.68 is: 11,706.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,197.18 : 20,972.86 = 8,482.68 : x
  2. Step 2: Convert to fraction form
    15,197.18/20,972.86 = 8,482.68/x
  3. Step 3: Cross multiply
    15,197.18x = 20,972.86 × 8,482.68
  4. Step 4: Simplify right side
    15,197.18x = 177,906,038.86
  5. Step 5: Solve for x
    x = 177,906,038.86/15,197.18
  6. Step 6: Final answer
    x = 11,706.52

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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.