Home / 13,460.70-20,280.78-12,397.98

Finding the Fourth Proportional to 13,460.70, 20,280.78 and 12,397.98

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Solution

The fourth proportional to 13,460.70, 20,280.78 and 12,397.98 is: 18,679.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,460.70 : 20,280.78 = 12,397.98 : x
  2. Step 2: Convert to fraction form
    13,460.70/20,280.78 = 12,397.98/x
  3. Step 3: Cross multiply
    13,460.70x = 20,280.78 × 12,397.98
  4. Step 4: Simplify right side
    13,460.70x = 251,440,704.82
  5. Step 5: Solve for x
    x = 251,440,704.82/13,460.70
  6. Step 6: Final answer
    x = 18,679.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.