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Finding the Fourth Proportional to 13,762.55, 18,992.30 and 7,794.21

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Solution

The fourth proportional to 13,762.55, 18,992.30 and 7,794.21 is: 10,756.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,762.55 : 18,992.30 = 7,794.21 : x
  2. Step 2: Convert to fraction form
    13,762.55/18,992.30 = 7,794.21/x
  3. Step 3: Cross multiply
    13,762.55x = 18,992.30 × 7,794.21
  4. Step 4: Simplify right side
    13,762.55x = 148,029,974.58
  5. Step 5: Solve for x
    x = 148,029,974.58/13,762.55
  6. Step 6: Final answer
    x = 10,756.00

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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.