Home / 39,887.12-55,043.39-21,981.66

Finding the Fourth Proportional to 39,887.12, 55,043.39 and 21,981.66

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Solution

The fourth proportional to 39,887.12, 55,043.39 and 21,981.66 is: 30,334.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,887.12 : 55,043.39 = 21,981.66 : x
  2. Step 2: Convert to fraction form
    39,887.12/55,043.39 = 21,981.66/x
  3. Step 3: Cross multiply
    39,887.12x = 55,043.39 × 21,981.66
  4. Step 4: Simplify right side
    39,887.12x = 1,209,944,974.32
  5. Step 5: Solve for x
    x = 1,209,944,974.32/39,887.12
  6. Step 6: Final answer
    x = 30,334.23

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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.