Home / 13,724.20-18,938.82-7,755.40

Finding the Fourth Proportional to 13,724.20, 18,938.82 and 7,755.40

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Solution

The fourth proportional to 13,724.20, 18,938.82 and 7,755.40 is: 10,702.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.20 : 18,938.82 = 7,755.40 : x
  2. Step 2: Convert to fraction form
    13,724.20/18,938.82 = 7,755.40/x
  3. Step 3: Cross multiply
    13,724.20x = 18,938.82 × 7,755.40
  4. Step 4: Simplify right side
    13,724.20x = 146,878,124.63
  5. Step 5: Solve for x
    x = 146,878,124.63/13,724.20
  6. Step 6: Final answer
    x = 10,702.13

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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.