Home / 20,973.80-31,432.74-7,812.92

Finding the Fourth Proportional to 20,973.80, 31,432.74 and 7,812.92

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Solution

The fourth proportional to 20,973.80, 31,432.74 and 7,812.92 is: 11,708.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.80 : 31,432.74 = 7,812.92 : x
  2. Step 2: Convert to fraction form
    20,973.80/31,432.74 = 7,812.92/x
  3. Step 3: Cross multiply
    20,973.80x = 31,432.74 × 7,812.92
  4. Step 4: Simplify right side
    20,973.80x = 245,581,483.00
  5. Step 5: Solve for x
    x = 245,581,483.00/20,973.80
  6. Step 6: Final answer
    x = 11,708.96

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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.