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Finding the Fourth Proportional to 8,408.16, 11,602.80 and 5,220.72

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Solution

The fourth proportional to 8,408.16, 11,602.80 and 5,220.72 is: 7,204.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,408.16 : 11,602.80 = 5,220.72 : x
  2. Step 2: Convert to fraction form
    8,408.16/11,602.80 = 5,220.72/x
  3. Step 3: Cross multiply
    8,408.16x = 11,602.80 × 5,220.72
  4. Step 4: Simplify right side
    8,408.16x = 60,574,970.02
  5. Step 5: Solve for x
    x = 60,574,970.02/8,408.16
  6. Step 6: Final answer
    x = 7,204.31

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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.