Home / 13,721.75-18,936.22-7,434.13

Finding the Fourth Proportional to 13,721.75, 18,936.22 and 7,434.13

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Solution

The fourth proportional to 13,721.75, 18,936.22 and 7,434.13 is: 10,259.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.75 : 18,936.22 = 7,434.13 : x
  2. Step 2: Convert to fraction form
    13,721.75/18,936.22 = 7,434.13/x
  3. Step 3: Cross multiply
    13,721.75x = 18,936.22 × 7,434.13
  4. Step 4: Simplify right side
    13,721.75x = 140,774,226.51
  5. Step 5: Solve for x
    x = 140,774,226.51/13,721.75
  6. Step 6: Final answer
    x = 10,259.20

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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.