Home / 19,271.56-28,911.72-8,178.64

Finding the Fourth Proportional to 19,271.56, 28,911.72 and 8,178.64

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Solution

The fourth proportional to 19,271.56, 28,911.72 and 8,178.64 is: 12,269.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,271.56 : 28,911.72 = 8,178.64 : x
  2. Step 2: Convert to fraction form
    19,271.56/28,911.72 = 8,178.64/x
  3. Step 3: Cross multiply
    19,271.56x = 28,911.72 × 8,178.64
  4. Step 4: Simplify right side
    19,271.56x = 236,458,549.66
  5. Step 5: Solve for x
    x = 236,458,549.66/19,271.56
  6. Step 6: Final answer
    x = 12,269.82

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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.