Home / 18,688.72-28,028.20-8,825.36

Finding the Fourth Proportional to 18,688.72, 28,028.20 and 8,825.36

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Solution

The fourth proportional to 18,688.72, 28,028.20 and 8,825.36 is: 13,235.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688.72 : 28,028.20 = 8,825.36 : x
  2. Step 2: Convert to fraction form
    18,688.72/28,028.20 = 8,825.36/x
  3. Step 3: Cross multiply
    18,688.72x = 28,028.20 × 8,825.36
  4. Step 4: Simplify right side
    18,688.72x = 247,358,955.15
  5. Step 5: Solve for x
    x = 247,358,955.15/18,688.72
  6. Step 6: Final answer
    x = 13,235.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.