Home / 39,020.13-53,847.79-21,115.08

Finding the Fourth Proportional to 39,020.13, 53,847.79 and 21,115.08

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Solution

The fourth proportional to 39,020.13, 53,847.79 and 21,115.08 is: 29,138.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,020.13 : 53,847.79 = 21,115.08 : x
  2. Step 2: Convert to fraction form
    39,020.13/53,847.79 = 21,115.08/x
  3. Step 3: Cross multiply
    39,020.13x = 53,847.79 × 21,115.08
  4. Step 4: Simplify right side
    39,020.13x = 1,137,000,340.89
  5. Step 5: Solve for x
    x = 1,137,000,340.89/39,020.13
  6. Step 6: Final answer
    x = 29,138.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.