Home / 39,756.12-54,864.90-21,851.82

Finding the Fourth Proportional to 39,756.12, 54,864.90 and 21,851.82

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Solution

The fourth proportional to 39,756.12, 54,864.90 and 21,851.82 is: 30,156.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,756.12 : 54,864.90 = 21,851.82 : x
  2. Step 2: Convert to fraction form
    39,756.12/54,864.90 = 21,851.82/x
  3. Step 3: Cross multiply
    39,756.12x = 54,864.90 × 21,851.82
  4. Step 4: Simplify right side
    39,756.12x = 1,198,897,919.12
  5. Step 5: Solve for x
    x = 1,198,897,919.12/39,756.12
  6. Step 6: Final answer
    x = 30,156.31

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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.