Home / 13,971.72-19,280.70-7,684.20

Finding the Fourth Proportional to 13,971.72, 19,280.70 and 7,684.20

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Solution

The fourth proportional to 13,971.72, 19,280.70 and 7,684.20 is: 10,604.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,971.72 : 19,280.70 = 7,684.20 : x
  2. Step 2: Convert to fraction form
    13,971.72/19,280.70 = 7,684.20/x
  3. Step 3: Cross multiply
    13,971.72x = 19,280.70 × 7,684.20
  4. Step 4: Simplify right side
    13,971.72x = 148,156,754.94
  5. Step 5: Solve for x
    x = 148,156,754.94/13,971.72
  6. Step 6: Final answer
    x = 10,604.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.