Home / 8,972.50-12,380.88-4,993.78

Finding the Fourth Proportional to 8,972.50, 12,380.88 and 4,993.78

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Solution

The fourth proportional to 8,972.50, 12,380.88 and 4,993.78 is: 6,890.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972.50 : 12,380.88 = 4,993.78 : x
  2. Step 2: Convert to fraction form
    8,972.50/12,380.88 = 4,993.78/x
  3. Step 3: Cross multiply
    8,972.50x = 12,380.88 × 4,993.78
  4. Step 4: Simplify right side
    8,972.50x = 61,827,390.93
  5. Step 5: Solve for x
    x = 61,827,390.93/8,972.50
  6. Step 6: Final answer
    x = 6,890.77

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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.