Home / 12,109.40-18,156.81-7,895.78

Finding the Fourth Proportional to 12,109.40, 18,156.81 and 7,895.78

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Solution

The fourth proportional to 12,109.40, 18,156.81 and 7,895.78 is: 11,838.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.40 : 18,156.81 = 7,895.78 : x
  2. Step 2: Convert to fraction form
    12,109.40/18,156.81 = 7,895.78/x
  3. Step 3: Cross multiply
    12,109.40x = 18,156.81 × 7,895.78
  4. Step 4: Simplify right side
    12,109.40x = 143,362,177.26
  5. Step 5: Solve for x
    x = 143,362,177.26/12,109.40
  6. Step 6: Final answer
    x = 11,838.92

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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.