Home / 13,721.77-18,936.07-7,434.15

Finding the Fourth Proportional to 13,721.77, 18,936.07 and 7,434.15

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Solution

The fourth proportional to 13,721.77, 18,936.07 and 7,434.15 is: 10,259.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.77 : 18,936.07 = 7,434.15 : x
  2. Step 2: Convert to fraction form
    13,721.77/18,936.07 = 7,434.15/x
  3. Step 3: Cross multiply
    13,721.77x = 18,936.07 × 7,434.15
  4. Step 4: Simplify right side
    13,721.77x = 140,773,452.94
  5. Step 5: Solve for x
    x = 140,773,452.94/13,721.77
  6. Step 6: Final answer
    x = 10,259.13

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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.