Home / 39,086.12-53,938.64-21,180.66

Finding the Fourth Proportional to 39,086.12, 53,938.64 and 21,180.66

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Solution

The fourth proportional to 39,086.12, 53,938.64 and 21,180.66 is: 29,229.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,086.12 : 53,938.64 = 21,180.66 : x
  2. Step 2: Convert to fraction form
    39,086.12/53,938.64 = 21,180.66/x
  3. Step 3: Cross multiply
    39,086.12x = 53,938.64 × 21,180.66
  4. Step 4: Simplify right side
    39,086.12x = 1,142,455,994.70
  5. Step 5: Solve for x
    x = 1,142,455,994.70/39,086.12
  6. Step 6: Final answer
    x = 29,229.20

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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.