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Finding the Fourth Proportional to 18,965.23, 26,159.83 and 11,513.23

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Solution

The fourth proportional to 18,965.23, 26,159.83 and 11,513.23 is: 15,880.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.23 : 26,159.83 = 11,513.23 : x
  2. Step 2: Convert to fraction form
    18,965.23/26,159.83 = 11,513.23/x
  3. Step 3: Cross multiply
    18,965.23x = 26,159.83 × 11,513.23
  4. Step 4: Simplify right side
    18,965.23x = 301,184,139.55
  5. Step 5: Solve for x
    x = 301,184,139.55/18,965.23
  6. Step 6: Final answer
    x = 15,880.86

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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.