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Finding the Fourth Proportional to 47,579.69, 71,370.69 and 15,990.21

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Solution

The fourth proportional to 47,579.69, 71,370.69 and 15,990.21 is: 23,985.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,579.69 : 71,370.69 = 15,990.21 : x
  2. Step 2: Convert to fraction form
    47,579.69/71,370.69 = 15,990.21/x
  3. Step 3: Cross multiply
    47,579.69x = 71,370.69 × 15,990.21
  4. Step 4: Simplify right side
    47,579.69x = 1,141,232,320.94
  5. Step 5: Solve for x
    x = 1,141,232,320.94/47,579.69
  6. Step 6: Final answer
    x = 23,985.71

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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.