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Finding the Fourth Proportional to 20,456.76, 30,681.66 and 6,605.76

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Solution

The fourth proportional to 20,456.76, 30,681.66 and 6,605.76 is: 9,907.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,456.76 : 30,681.66 = 6,605.76 : x
  2. Step 2: Convert to fraction form
    20,456.76/30,681.66 = 6,605.76/x
  3. Step 3: Cross multiply
    20,456.76x = 30,681.66 × 6,605.76
  4. Step 4: Simplify right side
    20,456.76x = 202,675,682.36
  5. Step 5: Solve for x
    x = 202,675,682.36/20,456.76
  6. Step 6: Final answer
    x = 9,907.52

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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.