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Finding the Fourth Proportional to 19,271.20, 28,912.20 and 9,410.80

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Solution

The fourth proportional to 19,271.20, 28,912.20 and 9,410.80 is: 14,118.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,271.20 : 28,912.20 = 9,410.80 : x
  2. Step 2: Convert to fraction form
    19,271.20/28,912.20 = 9,410.80/x
  3. Step 3: Cross multiply
    19,271.20x = 28,912.20 × 9,410.80
  4. Step 4: Simplify right side
    19,271.20x = 272,086,931.76
  5. Step 5: Solve for x
    x = 272,086,931.76/19,271.20
  6. Step 6: Final answer
    x = 14,118.84

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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.