Home / 20,639.64-30,955.32-10,105.12

Finding the Fourth Proportional to 20,639.64, 30,955.32 and 10,105.12

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Solution

The fourth proportional to 20,639.64, 30,955.32 and 10,105.12 is: 15,155.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.64 : 30,955.32 = 10,105.12 : x
  2. Step 2: Convert to fraction form
    20,639.64/30,955.32 = 10,105.12/x
  3. Step 3: Cross multiply
    20,639.64x = 30,955.32 × 10,105.12
  4. Step 4: Simplify right side
    20,639.64x = 312,807,223.24
  5. Step 5: Solve for x
    x = 312,807,223.24/20,639.64
  6. Step 6: Final answer
    x = 15,155.65

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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.