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Finding the Fourth Proportional to 6,420.40, 8,851.92 and 5,266.34

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Solution

The fourth proportional to 6,420.40, 8,851.92 and 5,266.34 is: 7,260.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.40 : 8,851.92 = 5,266.34 : x
  2. Step 2: Convert to fraction form
    6,420.40/8,851.92 = 5,266.34/x
  3. Step 3: Cross multiply
    6,420.40x = 8,851.92 × 5,266.34
  4. Step 4: Simplify right side
    6,420.40x = 46,617,220.37
  5. Step 5: Solve for x
    x = 46,617,220.37/6,420.40
  6. Step 6: Final answer
    x = 7,260.80

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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.