Home / 39,686.22-54,767.66-21,782.88

Finding the Fourth Proportional to 39,686.22, 54,767.66 and 21,782.88

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Solution

The fourth proportional to 39,686.22, 54,767.66 and 21,782.88 is: 30,060.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,686.22 : 54,767.66 = 21,782.88 : x
  2. Step 2: Convert to fraction form
    39,686.22/54,767.66 = 21,782.88/x
  3. Step 3: Cross multiply
    39,686.22x = 54,767.66 × 21,782.88
  4. Step 4: Simplify right side
    39,686.22x = 1,192,997,256.75
  5. Step 5: Solve for x
    x = 1,192,997,256.75/39,686.22
  6. Step 6: Final answer
    x = 30,060.74

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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.