Home / 38,720.40-58,091.40-18,999.60

Finding the Fourth Proportional to 38,720.40, 58,091.40 and 18,999.60

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Solution

The fourth proportional to 38,720.40, 58,091.40 and 18,999.60 is: 28,504.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,720.40 : 58,091.40 = 18,999.60 : x
  2. Step 2: Convert to fraction form
    38,720.40/58,091.40 = 18,999.60/x
  3. Step 3: Cross multiply
    38,720.40x = 58,091.40 × 18,999.60
  4. Step 4: Simplify right side
    38,720.40x = 1,103,713,363.44
  5. Step 5: Solve for x
    x = 1,103,713,363.44/38,720.40
  6. Step 6: Final answer
    x = 28,504.70

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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.