Home / 13,710.39-18,920.36-7,422.77

Finding the Fourth Proportional to 13,710.39, 18,920.36 and 7,422.77

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Solution

The fourth proportional to 13,710.39, 18,920.36 and 7,422.77 is: 10,243.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.39 : 18,920.36 = 7,422.77 : x
  2. Step 2: Convert to fraction form
    13,710.39/18,920.36 = 7,422.77/x
  3. Step 3: Cross multiply
    13,710.39x = 18,920.36 × 7,422.77
  4. Step 4: Simplify right side
    13,710.39x = 140,441,480.60
  5. Step 5: Solve for x
    x = 140,441,480.60/13,710.39
  6. Step 6: Final answer
    x = 10,243.43

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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.