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Finding the Fourth Proportional to 18,762.37, 25,880.79 and 12,389.02

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Solution

The fourth proportional to 18,762.37, 25,880.79 and 12,389.02 is: 17,089.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.37 : 25,880.79 = 12,389.02 : x
  2. Step 2: Convert to fraction form
    18,762.37/25,880.79 = 12,389.02/x
  3. Step 3: Cross multiply
    18,762.37x = 25,880.79 × 12,389.02
  4. Step 4: Simplify right side
    18,762.37x = 320,637,624.93
  5. Step 5: Solve for x
    x = 320,637,624.93/18,762.37
  6. Step 6: Final answer
    x = 17,089.40

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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.