Home / 6,420.26-9,630.42-1,977.87

Finding the Fourth Proportional to 6,420.26, 9,630.42 and 1,977.87

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Solution

The fourth proportional to 6,420.26, 9,630.42 and 1,977.87 is: 2,966.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.26 : 9,630.42 = 1,977.87 : x
  2. Step 2: Convert to fraction form
    6,420.26/9,630.42 = 1,977.87/x
  3. Step 3: Cross multiply
    6,420.26x = 9,630.42 × 1,977.87
  4. Step 4: Simplify right side
    6,420.26x = 19,047,718.81
  5. Step 5: Solve for x
    x = 19,047,718.81/6,420.26
  6. Step 6: Final answer
    x = 2,966.81

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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.