Home / 13,758.11-18,985.82-7,790.34

Finding the Fourth Proportional to 13,758.11, 18,985.82 and 7,790.34

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Solution

The fourth proportional to 13,758.11, 18,985.82 and 7,790.34 is: 10,750.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.11 : 18,985.82 = 7,790.34 : x
  2. Step 2: Convert to fraction form
    13,758.11/18,985.82 = 7,790.34/x
  3. Step 3: Cross multiply
    13,758.11x = 18,985.82 × 7,790.34
  4. Step 4: Simplify right side
    13,758.11x = 147,905,992.98
  5. Step 5: Solve for x
    x = 147,905,992.98/13,758.11
  6. Step 6: Final answer
    x = 10,750.46

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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.