Home / 40,720.05-61,078.05-21,000.60

Finding the Fourth Proportional to 40,720.05, 61,078.05 and 21,000.60

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Solution

The fourth proportional to 40,720.05, 61,078.05 and 21,000.60 is: 31,499.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,720.05 : 61,078.05 = 21,000.60 : x
  2. Step 2: Convert to fraction form
    40,720.05/61,078.05 = 21,000.60/x
  3. Step 3: Cross multiply
    40,720.05x = 61,078.05 × 21,000.60
  4. Step 4: Simplify right side
    40,720.05x = 1,282,675,696.83
  5. Step 5: Solve for x
    x = 1,282,675,696.83/40,720.05
  6. Step 6: Final answer
    x = 31,499.86

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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.