Home / 13,721.13-18,938.27-7,756.26

Finding the Fourth Proportional to 13,721.13, 18,938.27 and 7,756.26

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Solution

The fourth proportional to 13,721.13, 18,938.27 and 7,756.26 is: 10,705.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.13 : 18,938.27 = 7,756.26 : x
  2. Step 2: Convert to fraction form
    13,721.13/18,938.27 = 7,756.26/x
  3. Step 3: Cross multiply
    13,721.13x = 18,938.27 × 7,756.26
  4. Step 4: Simplify right side
    13,721.13x = 146,890,107.29
  5. Step 5: Solve for x
    x = 146,890,107.29/13,721.13
  6. Step 6: Final answer
    x = 10,705.39

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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.