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Finding the Fourth Proportional to 20,470.57, 30,715.56 and 6,619.57

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Solution

The fourth proportional to 20,470.57, 30,715.56 and 6,619.57 is: 9,932.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.57 : 30,715.56 = 6,619.57 : x
  2. Step 2: Convert to fraction form
    20,470.57/30,715.56 = 6,619.57/x
  3. Step 3: Cross multiply
    20,470.57x = 30,715.56 × 6,619.57
  4. Step 4: Simplify right side
    20,470.57x = 203,323,799.51
  5. Step 5: Solve for x
    x = 203,323,799.51/20,470.57
  6. Step 6: Final answer
    x = 9,932.49

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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.