Home / 20,639.93-30,955.80-10,105.43

Finding the Fourth Proportional to 20,639.93, 30,955.80 and 10,105.43

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Solution

The fourth proportional to 20,639.93, 30,955.80 and 10,105.43 is: 15,156.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.93 : 30,955.80 = 10,105.43 : x
  2. Step 2: Convert to fraction form
    20,639.93/30,955.80 = 10,105.43/x
  3. Step 3: Cross multiply
    20,639.93x = 30,955.80 × 10,105.43
  4. Step 4: Simplify right side
    20,639.93x = 312,821,669.99
  5. Step 5: Solve for x
    x = 312,821,669.99/20,639.93
  6. Step 6: Final answer
    x = 15,156.14

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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.