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Finding the Fourth Proportional to 47,286.80, 70,946.40 and 21,010.40

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Solution

The fourth proportional to 47,286.80, 70,946.40 and 21,010.40 is: 31,522.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,286.80 : 70,946.40 = 21,010.40 : x
  2. Step 2: Convert to fraction form
    47,286.80/70,946.40 = 21,010.40/x
  3. Step 3: Cross multiply
    47,286.80x = 70,946.40 × 21,010.40
  4. Step 4: Simplify right side
    47,286.80x = 1,490,612,242.56
  5. Step 5: Solve for x
    x = 1,490,612,242.56/47,286.80
  6. Step 6: Final answer
    x = 31,522.80

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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.