Home / 20,581.20-30,853.32-7,430.48

Finding the Fourth Proportional to 20,581.20, 30,853.32 and 7,430.48

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Solution

The fourth proportional to 20,581.20, 30,853.32 and 7,430.48 is: 11,139.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.20 : 30,853.32 = 7,430.48 : x
  2. Step 2: Convert to fraction form
    20,581.20/30,853.32 = 7,430.48/x
  3. Step 3: Cross multiply
    20,581.20x = 30,853.32 × 7,430.48
  4. Step 4: Simplify right side
    20,581.20x = 229,254,977.19
  5. Step 5: Solve for x
    x = 229,254,977.19/20,581.20
  6. Step 6: Final answer
    x = 11,139.05

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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.