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Finding the Fourth Proportional to 14,919.20, 22,378.80 and 14,688.80

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Solution

The fourth proportional to 14,919.20, 22,378.80 and 14,688.80 is: 22,033.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,919.20 : 22,378.80 = 14,688.80 : x
  2. Step 2: Convert to fraction form
    14,919.20/22,378.80 = 14,688.80/x
  3. Step 3: Cross multiply
    14,919.20x = 22,378.80 × 14,688.80
  4. Step 4: Simplify right side
    14,919.20x = 328,717,717.44
  5. Step 5: Solve for x
    x = 328,717,717.44/14,919.20
  6. Step 6: Final answer
    x = 22,033.20

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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.