Home / 20,724.36-31,100.40-10,199.40

Finding the Fourth Proportional to 20,724.36, 31,100.40 and 10,199.40

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Solution

The fourth proportional to 20,724.36, 31,100.40 and 10,199.40 is: 15,305.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.36 : 31,100.40 = 10,199.40 : x
  2. Step 2: Convert to fraction form
    20,724.36/31,100.40 = 10,199.40/x
  3. Step 3: Cross multiply
    20,724.36x = 31,100.40 × 10,199.40
  4. Step 4: Simplify right side
    20,724.36x = 317,205,419.76
  5. Step 5: Solve for x
    x = 317,205,419.76/20,724.36
  6. Step 6: Final answer
    x = 15,305.92

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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.