Home / 30,808.36-42,515.54-16,661.20

Finding the Fourth Proportional to 30,808.36, 42,515.54 and 16,661.20

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Solution

The fourth proportional to 30,808.36, 42,515.54 and 16,661.20 is: 22,992.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,808.36 : 42,515.54 = 16,661.20 : x
  2. Step 2: Convert to fraction form
    30,808.36/42,515.54 = 16,661.20/x
  3. Step 3: Cross multiply
    30,808.36x = 42,515.54 × 16,661.20
  4. Step 4: Simplify right side
    30,808.36x = 708,359,915.05
  5. Step 5: Solve for x
    x = 708,359,915.05/30,808.36
  6. Step 6: Final answer
    x = 22,992.46

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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.