Home / 20,914.81-31,365.55-6,871.58

Finding the Fourth Proportional to 20,914.81, 31,365.55 and 6,871.58

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Solution

The fourth proportional to 20,914.81, 31,365.55 and 6,871.58 is: 10,305.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.81 : 31,365.55 = 6,871.58 : x
  2. Step 2: Convert to fraction form
    20,914.81/31,365.55 = 6,871.58/x
  3. Step 3: Cross multiply
    20,914.81x = 31,365.55 × 6,871.58
  4. Step 4: Simplify right side
    20,914.81x = 215,531,051.21
  5. Step 5: Solve for x
    x = 215,531,051.21/20,914.81
  6. Step 6: Final answer
    x = 10,305.19

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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.