Home / 43,190-64,680.51-20,948.30

Finding the Fourth Proportional to 43,190, 64,680.51 and 20,948.30

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Solution

The fourth proportional to 43,190, 64,680.51 and 20,948.30 is: 31,371.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,190 : 64,680.51 = 20,948.30 : x
  2. Step 2: Convert to fraction form
    43,190/64,680.51 = 20,948.30/x
  3. Step 3: Cross multiply
    43,190x = 64,680.51 × 20,948.30
  4. Step 4: Simplify right side
    43,190x = 1,354,946,727.63
  5. Step 5: Solve for x
    x = 1,354,946,727.63/43,190
  6. Step 6: Final answer
    x = 31,371.77

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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.