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Finding the Fourth Proportional to 19,172.40, 28,780.20 and 14,809.20

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Solution

The fourth proportional to 19,172.40, 28,780.20 and 14,809.20 is: 22,230.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,172.40 : 28,780.20 = 14,809.20 : x
  2. Step 2: Convert to fraction form
    19,172.40/28,780.20 = 14,809.20/x
  3. Step 3: Cross multiply
    19,172.40x = 28,780.20 × 14,809.20
  4. Step 4: Simplify right side
    19,172.40x = 426,211,737.84
  5. Step 5: Solve for x
    x = 426,211,737.84/19,172.40
  6. Step 6: Final answer
    x = 22,230.48

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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.