Home / 39,686.11-54,767.51-21,782.78

Finding the Fourth Proportional to 39,686.11, 54,767.51 and 21,782.78

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Solution

The fourth proportional to 39,686.11, 54,767.51 and 21,782.78 is: 30,060.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,686.11 : 54,767.51 = 21,782.78 : x
  2. Step 2: Convert to fraction form
    39,686.11/54,767.51 = 21,782.78/x
  3. Step 3: Cross multiply
    39,686.11x = 54,767.51 × 21,782.78
  4. Step 4: Simplify right side
    39,686.11x = 1,192,988,621.48
  5. Step 5: Solve for x
    x = 1,192,988,621.48/39,686.11
  6. Step 6: Final answer
    x = 30,060.61

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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.