Home / 20,966.97-31,449.43-7,818.32

Finding the Fourth Proportional to 20,966.97, 31,449.43 and 7,818.32

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Solution

The fourth proportional to 20,966.97, 31,449.43 and 7,818.32 is: 11,727.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.97 : 31,449.43 = 7,818.32 : x
  2. Step 2: Convert to fraction form
    20,966.97/31,449.43 = 7,818.32/x
  3. Step 3: Cross multiply
    20,966.97x = 31,449.43 × 7,818.32
  4. Step 4: Simplify right side
    20,966.97x = 245,881,707.56
  5. Step 5: Solve for x
    x = 245,881,707.56/20,966.97
  6. Step 6: Final answer
    x = 11,727.10

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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.