Home / 18,990.42-28,503.12-9,636.96

Finding the Fourth Proportional to 18,990.42, 28,503.12 and 9,636.96

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Solution

The fourth proportional to 18,990.42, 28,503.12 and 9,636.96 is: 14,464.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.42 : 28,503.12 = 9,636.96 : x
  2. Step 2: Convert to fraction form
    18,990.42/28,503.12 = 9,636.96/x
  3. Step 3: Cross multiply
    18,990.42x = 28,503.12 × 9,636.96
  4. Step 4: Simplify right side
    18,990.42x = 274,683,427.32
  5. Step 5: Solve for x
    x = 274,683,427.32/18,990.42
  6. Step 6: Final answer
    x = 14,464.32

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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.