Home / 47,981.79-71,972.58-12,921.48

Finding the Fourth Proportional to 47,981.79, 71,972.58 and 12,921.48

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Solution

The fourth proportional to 47,981.79, 71,972.58 and 12,921.48 is: 19,382.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,981.79 : 71,972.58 = 12,921.48 : x
  2. Step 2: Convert to fraction form
    47,981.79/71,972.58 = 12,921.48/x
  3. Step 3: Cross multiply
    47,981.79x = 71,972.58 × 12,921.48
  4. Step 4: Simplify right side
    47,981.79x = 929,992,253.02
  5. Step 5: Solve for x
    x = 929,992,253.02/47,981.79
  6. Step 6: Final answer
    x = 19,382.19

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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.