Home / 20,128.46-30,176.81-12,717.30

Finding the Fourth Proportional to 20,128.46, 30,176.81 and 12,717.30

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Solution

The fourth proportional to 20,128.46, 30,176.81 and 12,717.30 is: 19,065.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.46 : 30,176.81 = 12,717.30 : x
  2. Step 2: Convert to fraction form
    20,128.46/30,176.81 = 12,717.30/x
  3. Step 3: Cross multiply
    20,128.46x = 30,176.81 × 12,717.30
  4. Step 4: Simplify right side
    20,128.46x = 383,767,545.81
  5. Step 5: Solve for x
    x = 383,767,545.81/20,128.46
  6. Step 6: Final answer
    x = 19,065.92

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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.