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Finding the Fourth Proportional to 20,201.32, 30,300.90 and 7,053.40

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Solution

The fourth proportional to 20,201.32, 30,300.90 and 7,053.40 is: 10,579.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,201.32 : 30,300.90 = 7,053.40 : x
  2. Step 2: Convert to fraction form
    20,201.32/30,300.90 = 7,053.40/x
  3. Step 3: Cross multiply
    20,201.32x = 30,300.90 × 7,053.40
  4. Step 4: Simplify right side
    20,201.32x = 213,724,368.06
  5. Step 5: Solve for x
    x = 213,724,368.06/20,201.32
  6. Step 6: Final answer
    x = 10,579.72

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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.