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Finding the Fourth Proportional to 12,392.85, 18,572.87 and 9,090.48

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Solution

The fourth proportional to 12,392.85, 18,572.87 and 9,090.48 is: 13,623.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,392.85 : 18,572.87 = 9,090.48 : x
  2. Step 2: Convert to fraction form
    12,392.85/18,572.87 = 9,090.48/x
  3. Step 3: Cross multiply
    12,392.85x = 18,572.87 × 9,090.48
  4. Step 4: Simplify right side
    12,392.85x = 168,836,303.28
  5. Step 5: Solve for x
    x = 168,836,303.28/12,392.85
  6. Step 6: Final answer
    x = 13,623.69

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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.