Home / 21,320.20-31,975.74-11,969.32

Finding the Fourth Proportional to 21,320.20, 31,975.74 and 11,969.32

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Solution

The fourth proportional to 21,320.20, 31,975.74 and 11,969.32 is: 17,951.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.20 : 31,975.74 = 11,969.32 : x
  2. Step 2: Convert to fraction form
    21,320.20/31,975.74 = 11,969.32/x
  3. Step 3: Cross multiply
    21,320.20x = 31,975.74 × 11,969.32
  4. Step 4: Simplify right side
    21,320.20x = 382,727,864.30
  5. Step 5: Solve for x
    x = 382,727,864.30/21,320.20
  6. Step 6: Final answer
    x = 17,951.42

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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.