Home / 18,991.36-26,225.55-12,288.55

Finding the Fourth Proportional to 18,991.36, 26,225.55 and 12,288.55

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Solution

The fourth proportional to 18,991.36, 26,225.55 and 12,288.55 is: 16,969.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.36 : 26,225.55 = 12,288.55 : x
  2. Step 2: Convert to fraction form
    18,991.36/26,225.55 = 12,288.55/x
  3. Step 3: Cross multiply
    18,991.36x = 26,225.55 × 12,288.55
  4. Step 4: Simplify right side
    18,991.36x = 322,273,894.62
  5. Step 5: Solve for x
    x = 322,273,894.62/18,991.36
  6. Step 6: Final answer
    x = 16,969.50

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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.