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Finding the Fourth Proportional to 8,980.36, 12,392.05 and 5,203.66

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Solution

The fourth proportional to 8,980.36, 12,392.05 and 5,203.66 is: 7,180.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.36 : 12,392.05 = 5,203.66 : x
  2. Step 2: Convert to fraction form
    8,980.36/12,392.05 = 5,203.66/x
  3. Step 3: Cross multiply
    8,980.36x = 12,392.05 × 5,203.66
  4. Step 4: Simplify right side
    8,980.36x = 64,484,014.90
  5. Step 5: Solve for x
    x = 64,484,014.90/8,980.36
  6. Step 6: Final answer
    x = 7,180.56

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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.