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Finding the Fourth Proportional to 15,270.48, 21,072.82 and 8,898.48

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Solution

The fourth proportional to 15,270.48, 21,072.82 and 8,898.48 is: 12,279.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,270.48 : 21,072.82 = 8,898.48 : x
  2. Step 2: Convert to fraction form
    15,270.48/21,072.82 = 8,898.48/x
  3. Step 3: Cross multiply
    15,270.48x = 21,072.82 × 8,898.48
  4. Step 4: Simplify right side
    15,270.48x = 187,516,067.31
  5. Step 5: Solve for x
    x = 187,516,067.31/15,270.48
  6. Step 6: Final answer
    x = 12,279.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.