Home / 9,919.80-14,880-6,639.30

Finding the Fourth Proportional to 9,919.80, 14,880 and 6,639.30

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Solution

The fourth proportional to 9,919.80, 14,880 and 6,639.30 is: 9,959.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.80 : 14,880 = 6,639.30 : x
  2. Step 2: Convert to fraction form
    9,919.80/14,880 = 6,639.30/x
  3. Step 3: Cross multiply
    9,919.80x = 14,880 × 6,639.30
  4. Step 4: Simplify right side
    9,919.80x = 98,792,784
  5. Step 5: Solve for x
    x = 98,792,784/9,919.80
  6. Step 6: Final answer
    x = 9,959.15

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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.