Home / 7,890.30-10,883.16-6,398.28

Finding the Fourth Proportional to 7,890.30, 10,883.16 and 6,398.28

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Solution

The fourth proportional to 7,890.30, 10,883.16 and 6,398.28 is: 8,825.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.30 : 10,883.16 = 6,398.28 : x
  2. Step 2: Convert to fraction form
    7,890.30/10,883.16 = 6,398.28/x
  3. Step 3: Cross multiply
    7,890.30x = 10,883.16 × 6,398.28
  4. Step 4: Simplify right side
    7,890.30x = 69,633,504.96
  5. Step 5: Solve for x
    x = 69,633,504.96/7,890.30
  6. Step 6: Final answer
    x = 8,825.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.