Home / 43,178.72-64,724.32-20,973.38

Finding the Fourth Proportional to 43,178.72, 64,724.32 and 20,973.38

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Solution

The fourth proportional to 43,178.72, 64,724.32 and 20,973.38 is: 31,438.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,178.72 : 64,724.32 = 20,973.38 : x
  2. Step 2: Convert to fraction form
    43,178.72/64,724.32 = 20,973.38/x
  3. Step 3: Cross multiply
    43,178.72x = 64,724.32 × 20,973.38
  4. Step 4: Simplify right side
    43,178.72x = 1,357,487,758.60
  5. Step 5: Solve for x
    x = 1,357,487,758.60/43,178.72
  6. Step 6: Final answer
    x = 31,438.81

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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.