Home / 39,880.19-55,037.10-21,975.20

Finding the Fourth Proportional to 39,880.19, 55,037.10 and 21,975.20

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Solution

The fourth proportional to 39,880.19, 55,037.10 and 21,975.20 is: 30,327.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,880.19 : 55,037.10 = 21,975.20 : x
  2. Step 2: Convert to fraction form
    39,880.19/55,037.10 = 21,975.20/x
  3. Step 3: Cross multiply
    39,880.19x = 55,037.10 × 21,975.20
  4. Step 4: Simplify right side
    39,880.19x = 1,209,451,004.73
  5. Step 5: Solve for x
    x = 1,209,451,004.73/39,880.19
  6. Step 6: Final answer
    x = 30,327.12

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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.