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Finding the Fourth Proportional to 18,762.87, 25,881.48 and 12,389.52

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Solution

The fourth proportional to 18,762.87, 25,881.48 and 12,389.52 is: 17,090.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.87 : 25,881.48 = 12,389.52 : x
  2. Step 2: Convert to fraction form
    18,762.87/25,881.48 = 12,389.52/x
  3. Step 3: Cross multiply
    18,762.87x = 25,881.48 × 12,389.52
  4. Step 4: Simplify right side
    18,762.87x = 320,659,114.09
  5. Step 5: Solve for x
    x = 320,659,114.09/18,762.87
  6. Step 6: Final answer
    x = 17,090.09

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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.