Home / 13,977.76-20,916.39-10,270.78

Finding the Fourth Proportional to 13,977.76, 20,916.39 and 10,270.78

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Solution

The fourth proportional to 13,977.76, 20,916.39 and 10,270.78 is: 15,369.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,977.76 : 20,916.39 = 10,270.78 : x
  2. Step 2: Convert to fraction form
    13,977.76/20,916.39 = 10,270.78/x
  3. Step 3: Cross multiply
    13,977.76x = 20,916.39 × 10,270.78
  4. Step 4: Simplify right side
    13,977.76x = 214,827,640.08
  5. Step 5: Solve for x
    x = 214,827,640.08/13,977.76
  6. Step 6: Final answer
    x = 15,369.25

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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.