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Finding the Fourth Proportional to 47,147.96, 70,710.99 and 13,859.12

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Solution

The fourth proportional to 47,147.96, 70,710.99 and 13,859.12 is: 20,785.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,147.96 : 70,710.99 = 13,859.12 : x
  2. Step 2: Convert to fraction form
    47,147.96/70,710.99 = 13,859.12/x
  3. Step 3: Cross multiply
    47,147.96x = 70,710.99 × 13,859.12
  4. Step 4: Simplify right side
    47,147.96x = 979,992,095.73
  5. Step 5: Solve for x
    x = 979,992,095.73/47,147.96
  6. Step 6: Final answer
    x = 20,785.46

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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.