Home / 42,890.46-64,379.26-20,722.48

Finding the Fourth Proportional to 42,890.46, 64,379.26 and 20,722.48

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Solution

The fourth proportional to 42,890.46, 64,379.26 and 20,722.48 is: 31,104.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,890.46 : 64,379.26 = 20,722.48 : x
  2. Step 2: Convert to fraction form
    42,890.46/64,379.26 = 20,722.48/x
  3. Step 3: Cross multiply
    42,890.46x = 64,379.26 × 20,722.48
  4. Step 4: Simplify right side
    42,890.46x = 1,334,097,927.76
  5. Step 5: Solve for x
    x = 1,334,097,927.76/42,890.46
  6. Step 6: Final answer
    x = 31,104.77

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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.