Home / 20,463.10-30,715.71-12,690.34

Finding the Fourth Proportional to 20,463.10, 30,715.71 and 12,690.34

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Solution

The fourth proportional to 20,463.10, 30,715.71 and 12,690.34 is: 19,048.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,463.10 : 30,715.71 = 12,690.34 : x
  2. Step 2: Convert to fraction form
    20,463.10/30,715.71 = 12,690.34/x
  3. Step 3: Cross multiply
    20,463.10x = 30,715.71 × 12,690.34
  4. Step 4: Simplify right side
    20,463.10x = 389,792,803.24
  5. Step 5: Solve for x
    x = 389,792,803.24/20,463.10
  6. Step 6: Final answer
    x = 19,048.57

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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.