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Finding the Fourth Proportional to 20,323.70, 30,485.55 and 11,575.70

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Solution

The fourth proportional to 20,323.70, 30,485.55 and 11,575.70 is: 17,363.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,323.70 : 30,485.55 = 11,575.70 : x
  2. Step 2: Convert to fraction form
    20,323.70/30,485.55 = 11,575.70/x
  3. Step 3: Cross multiply
    20,323.70x = 30,485.55 × 11,575.70
  4. Step 4: Simplify right side
    20,323.70x = 352,891,581.14
  5. Step 5: Solve for x
    x = 352,891,581.14/20,323.70
  6. Step 6: Final answer
    x = 17,363.55

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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.