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Finding the Fourth Proportional to 47,946.05, 71,919 and 12,885.70

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Solution

The fourth proportional to 47,946.05, 71,919 and 12,885.70 is: 19,328.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,946.05 : 71,919 = 12,885.70 : x
  2. Step 2: Convert to fraction form
    47,946.05/71,919 = 12,885.70/x
  3. Step 3: Cross multiply
    47,946.05x = 71,919 × 12,885.70
  4. Step 4: Simplify right side
    47,946.05x = 926,726,658.30
  5. Step 5: Solve for x
    x = 926,726,658.30/47,946.05
  6. Step 6: Final answer
    x = 19,328.53

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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.