Home / 47,721.40-71,582.10-12,664.60

Finding the Fourth Proportional to 47,721.40, 71,582.10 and 12,664.60

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Solution

The fourth proportional to 47,721.40, 71,582.10 and 12,664.60 is: 18,996.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,721.40 : 71,582.10 = 12,664.60 : x
  2. Step 2: Convert to fraction form
    47,721.40/71,582.10 = 12,664.60/x
  3. Step 3: Cross multiply
    47,721.40x = 71,582.10 × 12,664.60
  4. Step 4: Simplify right side
    47,721.40x = 906,558,663.66
  5. Step 5: Solve for x
    x = 906,558,663.66/47,721.40
  6. Step 6: Final answer
    x = 18,996.90

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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.