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Finding the Fourth Proportional to 19,285.40, 28,949.70 and 14,922.20

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Solution

The fourth proportional to 19,285.40, 28,949.70 and 14,922.20 is: 22,400.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,285.40 : 28,949.70 = 14,922.20 : x
  2. Step 2: Convert to fraction form
    19,285.40/28,949.70 = 14,922.20/x
  3. Step 3: Cross multiply
    19,285.40x = 28,949.70 × 14,922.20
  4. Step 4: Simplify right side
    19,285.40x = 431,993,213.34
  5. Step 5: Solve for x
    x = 431,993,213.34/19,285.40
  6. Step 6: Final answer
    x = 22,400.01

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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.