Home / 39,908.12-55,071.54-21,758.45

Finding the Fourth Proportional to 39,908.12, 55,071.54 and 21,758.45

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Solution

The fourth proportional to 39,908.12, 55,071.54 and 21,758.45 is: 30,025.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,908.12 : 55,071.54 = 21,758.45 : x
  2. Step 2: Convert to fraction form
    39,908.12/55,071.54 = 21,758.45/x
  3. Step 3: Cross multiply
    39,908.12x = 55,071.54 × 21,758.45
  4. Step 4: Simplify right side
    39,908.12x = 1,198,271,074.16
  5. Step 5: Solve for x
    x = 1,198,271,074.16/39,908.12
  6. Step 6: Final answer
    x = 30,025.75

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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.