Home / 42,782.92-64,120.88-20,590.36

Finding the Fourth Proportional to 42,782.92, 64,120.88 and 20,590.36

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Solution

The fourth proportional to 42,782.92, 64,120.88 and 20,590.36 is: 30,859.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,782.92 : 64,120.88 = 20,590.36 : x
  2. Step 2: Convert to fraction form
    42,782.92/64,120.88 = 20,590.36/x
  3. Step 3: Cross multiply
    42,782.92x = 64,120.88 × 20,590.36
  4. Step 4: Simplify right side
    42,782.92x = 1,320,271,899.77
  5. Step 5: Solve for x
    x = 1,320,271,899.77/42,782.92
  6. Step 6: Final answer
    x = 30,859.79

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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.