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Finding the Fourth Proportional to 8,980.14, 12,392.16 and 5,203.12

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Solution

The fourth proportional to 8,980.14, 12,392.16 and 5,203.12 is: 7,180.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.14 : 12,392.16 = 5,203.12 : x
  2. Step 2: Convert to fraction form
    8,980.14/12,392.16 = 5,203.12/x
  3. Step 3: Cross multiply
    8,980.14x = 12,392.16 × 5,203.12
  4. Step 4: Simplify right side
    8,980.14x = 64,477,895.54
  5. Step 5: Solve for x
    x = 64,477,895.54/8,980.14
  6. Step 6: Final answer
    x = 7,180.05

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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.