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Finding the Fourth Proportional to 28,662.50, 42,949.91 and 12,013.45

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Solution

The fourth proportional to 28,662.50, 42,949.91 and 12,013.45 is: 18,001.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,662.50 : 42,949.91 = 12,013.45 : x
  2. Step 2: Convert to fraction form
    28,662.50/42,949.91 = 12,013.45/x
  3. Step 3: Cross multiply
    28,662.50x = 42,949.91 × 12,013.45
  4. Step 4: Simplify right side
    28,662.50x = 515,976,649.46
  5. Step 5: Solve for x
    x = 515,976,649.46/28,662.50
  6. Step 6: Final answer
    x = 18,001.80

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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.