Home / 39,425.05-54,407.39-21,520.81

Finding the Fourth Proportional to 39,425.05, 54,407.39 and 21,520.81

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Solution

The fourth proportional to 39,425.05, 54,407.39 and 21,520.81 is: 29,699.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,425.05 : 54,407.39 = 21,520.81 : x
  2. Step 2: Convert to fraction form
    39,425.05/54,407.39 = 21,520.81/x
  3. Step 3: Cross multiply
    39,425.05x = 54,407.39 × 21,520.81
  4. Step 4: Simplify right side
    39,425.05x = 1,170,891,102.79
  5. Step 5: Solve for x
    x = 1,170,891,102.79/39,425.05
  6. Step 6: Final answer
    x = 29,699.17

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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.