Home / 18,926.70-28,379.60-8,784.02

Finding the Fourth Proportional to 18,926.70, 28,379.60 and 8,784.02

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Solution

The fourth proportional to 18,926.70, 28,379.60 and 8,784.02 is: 13,171.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,926.70 : 28,379.60 = 8,784.02 : x
  2. Step 2: Convert to fraction form
    18,926.70/28,379.60 = 8,784.02/x
  3. Step 3: Cross multiply
    18,926.70x = 28,379.60 × 8,784.02
  4. Step 4: Simplify right side
    18,926.70x = 249,286,973.99
  5. Step 5: Solve for x
    x = 249,286,973.99/18,926.70
  6. Step 6: Final answer
    x = 13,171.18

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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.