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Finding the Fourth Proportional to 19,271.60, 28,888.20 and 8,865.20

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Solution

The fourth proportional to 19,271.60, 28,888.20 and 8,865.20 is: 13,288.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,271.60 : 28,888.20 = 8,865.20 : x
  2. Step 2: Convert to fraction form
    19,271.60/28,888.20 = 8,865.20/x
  3. Step 3: Cross multiply
    19,271.60x = 28,888.20 × 8,865.20
  4. Step 4: Simplify right side
    19,271.60x = 256,099,670.64
  5. Step 5: Solve for x
    x = 256,099,670.64/19,271.60
  6. Step 6: Final answer
    x = 13,288.97

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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.