Home / 18,428.22-25,415.30-15,570.95

Finding the Fourth Proportional to 18,428.22, 25,415.30 and 15,570.95

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Solution

The fourth proportional to 18,428.22, 25,415.30 and 15,570.95 is: 21,474.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.22 : 25,415.30 = 15,570.95 : x
  2. Step 2: Convert to fraction form
    18,428.22/25,415.30 = 15,570.95/x
  3. Step 3: Cross multiply
    18,428.22x = 25,415.30 × 15,570.95
  4. Step 4: Simplify right side
    18,428.22x = 395,740,160.60
  5. Step 5: Solve for x
    x = 395,740,160.60/18,428.22
  6. Step 6: Final answer
    x = 21,474.68

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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.