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Finding the Fourth Proportional to 20,510.86, 30,764.85 and 11,718.22

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Solution

The fourth proportional to 20,510.86, 30,764.85 and 11,718.22 is: 17,576.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.86 : 30,764.85 = 11,718.22 : x
  2. Step 2: Convert to fraction form
    20,510.86/30,764.85 = 11,718.22/x
  3. Step 3: Cross multiply
    20,510.86x = 30,764.85 × 11,718.22
  4. Step 4: Simplify right side
    20,510.86x = 360,509,280.57
  5. Step 5: Solve for x
    x = 360,509,280.57/20,510.86
  6. Step 6: Final answer
    x = 17,576.51

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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.