Home / 39,686.30-54,766.94-21,536.63

Finding the Fourth Proportional to 39,686.30, 54,766.94 and 21,536.63

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Solution

The fourth proportional to 39,686.30, 54,766.94 and 21,536.63 is: 29,720.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,686.30 : 54,766.94 = 21,536.63 : x
  2. Step 2: Convert to fraction form
    39,686.30/54,766.94 = 21,536.63/x
  3. Step 3: Cross multiply
    39,686.30x = 54,766.94 × 21,536.63
  4. Step 4: Simplify right side
    39,686.30x = 1,179,495,454.93
  5. Step 5: Solve for x
    x = 1,179,495,454.93/39,686.30
  6. Step 6: Final answer
    x = 29,720.47

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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.