Home / 6,990.17-10,485.20-6,639.77

Finding the Fourth Proportional to 6,990.17, 10,485.20 and 6,639.77

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Solution

The fourth proportional to 6,990.17, 10,485.20 and 6,639.77 is: 9,959.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.17 : 10,485.20 = 6,639.77 : x
  2. Step 2: Convert to fraction form
    6,990.17/10,485.20 = 6,639.77/x
  3. Step 3: Cross multiply
    6,990.17x = 10,485.20 × 6,639.77
  4. Step 4: Simplify right side
    6,990.17x = 69,619,230.78
  5. Step 5: Solve for x
    x = 69,619,230.78/6,990.17
  6. Step 6: Final answer
    x = 9,959.60

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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.