Home / 20,881.41-31,317.86-7,730.66

Finding the Fourth Proportional to 20,881.41, 31,317.86 and 7,730.66

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Solution

The fourth proportional to 20,881.41, 31,317.86 and 7,730.66 is: 11,594.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.41 : 31,317.86 = 7,730.66 : x
  2. Step 2: Convert to fraction form
    20,881.41/31,317.86 = 7,730.66/x
  3. Step 3: Cross multiply
    20,881.41x = 31,317.86 × 7,730.66
  4. Step 4: Simplify right side
    20,881.41x = 242,107,727.59
  5. Step 5: Solve for x
    x = 242,107,727.59/20,881.41
  6. Step 6: Final answer
    x = 11,594.41

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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.