Home / 20,934.86-28,889.06-11,980.31

Finding the Fourth Proportional to 20,934.86, 28,889.06 and 11,980.31

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Solution

The fourth proportional to 20,934.86, 28,889.06 and 11,980.31 is: 16,532.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.86 : 28,889.06 = 11,980.31 : x
  2. Step 2: Convert to fraction form
    20,934.86/28,889.06 = 11,980.31/x
  3. Step 3: Cross multiply
    20,934.86x = 28,889.06 × 11,980.31
  4. Step 4: Simplify right side
    20,934.86x = 346,099,690.06
  5. Step 5: Solve for x
    x = 346,099,690.06/20,934.86
  6. Step 6: Final answer
    x = 16,532.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.