Home / 43,079.68-64,638.40-20,910.08

Finding the Fourth Proportional to 43,079.68, 64,638.40 and 20,910.08

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Solution

The fourth proportional to 43,079.68, 64,638.40 and 20,910.08 is: 31,374.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,079.68 : 64,638.40 = 20,910.08 : x
  2. Step 2: Convert to fraction form
    43,079.68/64,638.40 = 20,910.08/x
  3. Step 3: Cross multiply
    43,079.68x = 64,638.40 × 20,910.08
  4. Step 4: Simplify right side
    43,079.68x = 1,351,594,115.07
  5. Step 5: Solve for x
    x = 1,351,594,115.07/43,079.68
  6. Step 6: Final answer
    x = 31,374.28

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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.