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Finding the Fourth Proportional to 18,779.01, 28,166.68 and 4,928.01

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Solution

The fourth proportional to 18,779.01, 28,166.68 and 4,928.01 is: 7,391.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.01 : 28,166.68 = 4,928.01 : x
  2. Step 2: Convert to fraction form
    18,779.01/28,166.68 = 4,928.01/x
  3. Step 3: Cross multiply
    18,779.01x = 28,166.68 × 4,928.01
  4. Step 4: Simplify right side
    18,779.01x = 138,805,680.71
  5. Step 5: Solve for x
    x = 138,805,680.71/18,779.01
  6. Step 6: Final answer
    x = 7,391.53

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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.