Home / 42,849.20-64,305.40-20,360

Finding the Fourth Proportional to 42,849.20, 64,305.40 and 20,360

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Solution

The fourth proportional to 42,849.20, 64,305.40 and 20,360 is: 30,555.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,849.20 : 64,305.40 = 20,360 : x
  2. Step 2: Convert to fraction form
    42,849.20/64,305.40 = 20,360/x
  3. Step 3: Cross multiply
    42,849.20x = 64,305.40 × 20,360
  4. Step 4: Simplify right side
    42,849.20x = 1,309,257,944
  5. Step 5: Solve for x
    x = 1,309,257,944/42,849.20
  6. Step 6: Final answer
    x = 30,555.01

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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.