Home / 39,886.43-55,043.60-21,981.48

Finding the Fourth Proportional to 39,886.43, 55,043.60 and 21,981.48

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Solution

The fourth proportional to 39,886.43, 55,043.60 and 21,981.48 is: 30,334.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,886.43 : 55,043.60 = 21,981.48 : x
  2. Step 2: Convert to fraction form
    39,886.43/55,043.60 = 21,981.48/x
  3. Step 3: Cross multiply
    39,886.43x = 55,043.60 × 21,981.48
  4. Step 4: Simplify right side
    39,886.43x = 1,209,939,599.85
  5. Step 5: Solve for x
    x = 1,209,939,599.85/39,886.43
  6. Step 6: Final answer
    x = 30,334.62

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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.