Home / 43,206.20-64,736.40-20,971.70

Finding the Fourth Proportional to 43,206.20, 64,736.40 and 20,971.70

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Solution

The fourth proportional to 43,206.20, 64,736.40 and 20,971.70 is: 31,422.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,206.20 : 64,736.40 = 20,971.70 : x
  2. Step 2: Convert to fraction form
    43,206.20/64,736.40 = 20,971.70/x
  3. Step 3: Cross multiply
    43,206.20x = 64,736.40 × 20,971.70
  4. Step 4: Simplify right side
    43,206.20x = 1,357,632,359.88
  5. Step 5: Solve for x
    x = 1,357,632,359.88/43,206.20
  6. Step 6: Final answer
    x = 31,422.17

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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.