Home / 20,947.86-31,409.91-6,904.08

Finding the Fourth Proportional to 20,947.86, 31,409.91 and 6,904.08

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Solution

The fourth proportional to 20,947.86, 31,409.91 and 6,904.08 is: 10,352.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.86 : 31,409.91 = 6,904.08 : x
  2. Step 2: Convert to fraction form
    20,947.86/31,409.91 = 6,904.08/x
  3. Step 3: Cross multiply
    20,947.86x = 31,409.91 × 6,904.08
  4. Step 4: Simplify right side
    20,947.86x = 216,856,531.43
  5. Step 5: Solve for x
    x = 216,856,531.43/20,947.86
  6. Step 6: Final answer
    x = 10,352.20

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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.