Home / 42,912.98-64,358.69-20,409.77

Finding the Fourth Proportional to 42,912.98, 64,358.69 and 20,409.77

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Solution

The fourth proportional to 42,912.98, 64,358.69 and 20,409.77 is: 30,609.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,912.98 : 64,358.69 = 20,409.77 : x
  2. Step 2: Convert to fraction form
    42,912.98/64,358.69 = 20,409.77/x
  3. Step 3: Cross multiply
    42,912.98x = 64,358.69 × 20,409.77
  4. Step 4: Simplify right side
    42,912.98x = 1,313,545,636.56
  5. Step 5: Solve for x
    x = 1,313,545,636.56/42,912.98
  6. Step 6: Final answer
    x = 30,609.52

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1.5x scale

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.