Home / 40,720.30-61,078.43-21,000.85

Finding the Fourth Proportional to 40,720.30, 61,078.43 and 21,000.85

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Solution

The fourth proportional to 40,720.30, 61,078.43 and 21,000.85 is: 31,500.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,720.30 : 61,078.43 = 21,000.85 : x
  2. Step 2: Convert to fraction form
    40,720.30/61,078.43 = 21,000.85/x
  3. Step 3: Cross multiply
    40,720.30x = 61,078.43 × 21,000.85
  4. Step 4: Simplify right side
    40,720.30x = 1,282,698,841.66
  5. Step 5: Solve for x
    x = 1,282,698,841.66/40,720.30
  6. Step 6: Final answer
    x = 31,500.23

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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.