Home / 20,510.32-30,755.76-10,639.72

Finding the Fourth Proportional to 20,510.32, 30,755.76 and 10,639.72

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Solution

The fourth proportional to 20,510.32, 30,755.76 and 10,639.72 is: 15,954.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.32 : 30,755.76 = 10,639.72 : x
  2. Step 2: Convert to fraction form
    20,510.32/30,755.76 = 10,639.72/x
  3. Step 3: Cross multiply
    20,510.32x = 30,755.76 × 10,639.72
  4. Step 4: Simplify right side
    20,510.32x = 327,232,674.79
  5. Step 5: Solve for x
    x = 327,232,674.79/20,510.32
  6. Step 6: Final answer
    x = 15,954.54

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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.