Home / 6,420.28-9,630.75-1,803.64

Finding the Fourth Proportional to 6,420.28, 9,630.75 and 1,803.64

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Solution

The fourth proportional to 6,420.28, 9,630.75 and 1,803.64 is: 2,705.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.28 : 9,630.75 = 1,803.64 : x
  2. Step 2: Convert to fraction form
    6,420.28/9,630.75 = 1,803.64/x
  3. Step 3: Cross multiply
    6,420.28x = 9,630.75 × 1,803.64
  4. Step 4: Simplify right side
    6,420.28x = 17,370,405.93
  5. Step 5: Solve for x
    x = 17,370,405.93/6,420.28
  6. Step 6: Final answer
    x = 2,705.55

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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.