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Finding the Fourth Proportional to 47,856.72, 71,785.09 and 12,795.47

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Solution

The fourth proportional to 47,856.72, 71,785.09 and 12,795.47 is: 19,193.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,856.72 : 71,785.09 = 12,795.47 : x
  2. Step 2: Convert to fraction form
    47,856.72/71,785.09 = 12,795.47/x
  3. Step 3: Cross multiply
    47,856.72x = 71,785.09 × 12,795.47
  4. Step 4: Simplify right side
    47,856.72x = 918,523,819.83
  5. Step 5: Solve for x
    x = 918,523,819.83/47,856.72
  6. Step 6: Final answer
    x = 19,193.20

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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.