Home / 20,881.40-31,317.83-7,730.64

Finding the Fourth Proportional to 20,881.40, 31,317.83 and 7,730.64

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Solution

The fourth proportional to 20,881.40, 31,317.83 and 7,730.64 is: 11,594.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.40 : 31,317.83 = 7,730.64 : x
  2. Step 2: Convert to fraction form
    20,881.40/31,317.83 = 7,730.64/x
  3. Step 3: Cross multiply
    20,881.40x = 31,317.83 × 7,730.64
  4. Step 4: Simplify right side
    20,881.40x = 242,106,830.66
  5. Step 5: Solve for x
    x = 242,106,830.66/20,881.40
  6. Step 6: Final answer
    x = 11,594.38

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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.