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Finding the Fourth Proportional to 19,672.34, 27,148.65 and 10,720.34

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Solution

The fourth proportional to 19,672.34, 27,148.65 and 10,720.34 is: 14,794.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,672.34 : 27,148.65 = 10,720.34 : x
  2. Step 2: Convert to fraction form
    19,672.34/27,148.65 = 10,720.34/x
  3. Step 3: Cross multiply
    19,672.34x = 27,148.65 × 10,720.34
  4. Step 4: Simplify right side
    19,672.34x = 291,042,758.54
  5. Step 5: Solve for x
    x = 291,042,758.54/19,672.34
  6. Step 6: Final answer
    x = 14,794.52

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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.