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Finding the Fourth Proportional to 8,920.63, 13,381.16 and 2,997.60

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Solution

The fourth proportional to 8,920.63, 13,381.16 and 2,997.60 is: 4,496.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.63 : 13,381.16 = 2,997.60 : x
  2. Step 2: Convert to fraction form
    8,920.63/13,381.16 = 2,997.60/x
  3. Step 3: Cross multiply
    8,920.63x = 13,381.16 × 2,997.60
  4. Step 4: Simplify right side
    8,920.63x = 40,111,373.36
  5. Step 5: Solve for x
    x = 40,111,373.36/8,920.63
  6. Step 6: Final answer
    x = 4,496.47

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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.