Home / 20,929.86-31,394.79-6,889.32

Finding the Fourth Proportional to 20,929.86, 31,394.79 and 6,889.32

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Solution

The fourth proportional to 20,929.86, 31,394.79 and 6,889.32 is: 10,333.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.86 : 31,394.79 = 6,889.32 : x
  2. Step 2: Convert to fraction form
    20,929.86/31,394.79 = 6,889.32/x
  3. Step 3: Cross multiply
    20,929.86x = 31,394.79 × 6,889.32
  4. Step 4: Simplify right side
    20,929.86x = 216,288,754.64
  5. Step 5: Solve for x
    x = 216,288,754.64/20,929.86
  6. Step 6: Final answer
    x = 10,333.98

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1.5x scale

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.