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Finding the Fourth Proportional to 14,622.40, 21,908.40 and 6,815.20

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Solution

The fourth proportional to 14,622.40, 21,908.40 and 6,815.20 is: 10,211.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,622.40 : 21,908.40 = 6,815.20 : x
  2. Step 2: Convert to fraction form
    14,622.40/21,908.40 = 6,815.20/x
  3. Step 3: Cross multiply
    14,622.40x = 21,908.40 × 6,815.20
  4. Step 4: Simplify right side
    14,622.40x = 149,310,127.68
  5. Step 5: Solve for x
    x = 149,310,127.68/14,622.40
  6. Step 6: Final answer
    x = 10,211.05

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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.