Home / 21,210.32-31,826.40-8,739.56

Finding the Fourth Proportional to 21,210.32, 31,826.40 and 8,739.56

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Solution

The fourth proportional to 21,210.32, 31,826.40 and 8,739.56 is: 13,113.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.32 : 31,826.40 = 8,739.56 : x
  2. Step 2: Convert to fraction form
    21,210.32/31,826.40 = 8,739.56/x
  3. Step 3: Cross multiply
    21,210.32x = 31,826.40 × 8,739.56
  4. Step 4: Simplify right side
    21,210.32x = 278,148,732.38
  5. Step 5: Solve for x
    x = 278,148,732.38/21,210.32
  6. Step 6: Final answer
    x = 13,113.84

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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.