Home / 7,189.40-9,896.10-6,431.24

Finding the Fourth Proportional to 7,189.40, 9,896.10 and 6,431.24

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Solution

The fourth proportional to 7,189.40, 9,896.10 and 6,431.24 is: 8,852.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,189.40 : 9,896.10 = 6,431.24 : x
  2. Step 2: Convert to fraction form
    7,189.40/9,896.10 = 6,431.24/x
  3. Step 3: Cross multiply
    7,189.40x = 9,896.10 × 6,431.24
  4. Step 4: Simplify right side
    7,189.40x = 63,644,194.16
  5. Step 5: Solve for x
    x = 63,644,194.16/7,189.40
  6. Step 6: Final answer
    x = 8,852.50

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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.