Home / 43,381.20-65,039.40-18,400.80

Finding the Fourth Proportional to 43,381.20, 65,039.40 and 18,400.80

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Solution

The fourth proportional to 43,381.20, 65,039.40 and 18,400.80 is: 27,587.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,381.20 : 65,039.40 = 18,400.80 : x
  2. Step 2: Convert to fraction form
    43,381.20/65,039.40 = 18,400.80/x
  3. Step 3: Cross multiply
    43,381.20x = 65,039.40 × 18,400.80
  4. Step 4: Simplify right side
    43,381.20x = 1,196,776,991.52
  5. Step 5: Solve for x
    x = 1,196,776,991.52/43,381.20
  6. Step 6: Final answer
    x = 27,587.46

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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.