Home / 39,900.40-59,836.20-20,172.40

Finding the Fourth Proportional to 39,900.40, 59,836.20 and 20,172.40

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Solution

The fourth proportional to 39,900.40, 59,836.20 and 20,172.40 is: 30,251.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,900.40 : 59,836.20 = 20,172.40 : x
  2. Step 2: Convert to fraction form
    39,900.40/59,836.20 = 20,172.40/x
  3. Step 3: Cross multiply
    39,900.40x = 59,836.20 × 20,172.40
  4. Step 4: Simplify right side
    39,900.40x = 1,207,039,760.88
  5. Step 5: Solve for x
    x = 1,207,039,760.88/39,900.40
  6. Step 6: Final answer
    x = 30,251.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.