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Finding the Fourth Proportional to 8,124.53, 12,186.79 and 2,930.40

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Solution

The fourth proportional to 8,124.53, 12,186.79 and 2,930.40 is: 4,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,124.53 : 12,186.79 = 2,930.40 : x
  2. Step 2: Convert to fraction form
    8,124.53/12,186.79 = 2,930.40/x
  3. Step 3: Cross multiply
    8,124.53x = 12,186.79 × 2,930.40
  4. Step 4: Simplify right side
    8,124.53x = 35,712,169.42
  5. Step 5: Solve for x
    x = 35,712,169.42/8,124.53
  6. Step 6: Final answer
    x = 4,395.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.