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Finding the Fourth Proportional to 18,828.08, 28,239.96 and 4,978.16

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Solution

The fourth proportional to 18,828.08, 28,239.96 and 4,978.16 is: 7,466.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,828.08 : 28,239.96 = 4,978.16 : x
  2. Step 2: Convert to fraction form
    18,828.08/28,239.96 = 4,978.16/x
  3. Step 3: Cross multiply
    18,828.08x = 28,239.96 × 4,978.16
  4. Step 4: Simplify right side
    18,828.08x = 140,583,039.27
  5. Step 5: Solve for x
    x = 140,583,039.27/18,828.08
  6. Step 6: Final answer
    x = 7,466.67

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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.