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Finding the Fourth Proportional to 19,274.80, 28,890.60 and 9,911.20

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Solution

The fourth proportional to 19,274.80, 28,890.60 and 9,911.20 is: 14,855.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,274.80 : 28,890.60 = 9,911.20 : x
  2. Step 2: Convert to fraction form
    19,274.80/28,890.60 = 9,911.20/x
  3. Step 3: Cross multiply
    19,274.80x = 28,890.60 × 9,911.20
  4. Step 4: Simplify right side
    19,274.80x = 286,340,514.72
  5. Step 5: Solve for x
    x = 286,340,514.72/19,274.80
  6. Step 6: Final answer
    x = 14,855.69

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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.