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Finding the Fourth Proportional to 19,152.20, 28,728.30 and 10,695.80

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Solution

The fourth proportional to 19,152.20, 28,728.30 and 10,695.80 is: 16,043.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,152.20 : 28,728.30 = 10,695.80 : x
  2. Step 2: Convert to fraction form
    19,152.20/28,728.30 = 10,695.80/x
  3. Step 3: Cross multiply
    19,152.20x = 28,728.30 × 10,695.80
  4. Step 4: Simplify right side
    19,152.20x = 307,272,151.14
  5. Step 5: Solve for x
    x = 307,272,151.14/19,152.20
  6. Step 6: Final answer
    x = 16,043.70

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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.