Home / 30,540.11-42,153.71-18,603.33

Finding the Fourth Proportional to 30,540.11, 42,153.71 and 18,603.33

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Solution

The fourth proportional to 30,540.11, 42,153.71 and 18,603.33 is: 25,677.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,540.11 : 42,153.71 = 18,603.33 : x
  2. Step 2: Convert to fraction form
    30,540.11/42,153.71 = 18,603.33/x
  3. Step 3: Cross multiply
    30,540.11x = 42,153.71 × 18,603.33
  4. Step 4: Simplify right side
    30,540.11x = 784,199,284.84
  5. Step 5: Solve for x
    x = 784,199,284.84/30,540.11
  6. Step 6: Final answer
    x = 25,677.69

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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.