Home / 39,886.75-55,043.04-21,981.38

Finding the Fourth Proportional to 39,886.75, 55,043.04 and 21,981.38

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Solution

The fourth proportional to 39,886.75, 55,043.04 and 21,981.38 is: 30,333.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,886.75 : 55,043.04 = 21,981.38 : x
  2. Step 2: Convert to fraction form
    39,886.75/55,043.04 = 21,981.38/x
  3. Step 3: Cross multiply
    39,886.75x = 55,043.04 × 21,981.38
  4. Step 4: Simplify right side
    39,886.75x = 1,209,921,978.60
  5. Step 5: Solve for x
    x = 1,209,921,978.60/39,886.75
  6. Step 6: Final answer
    x = 30,333.93

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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.