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Finding the Fourth Proportional to 18,991.95, 26,647.05 and 18,991.95

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Solution

The fourth proportional to 18,991.95, 26,647.05 and 18,991.95 is: 26,647.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.95 : 26,647.05 = 18,991.95 : x
  2. Step 2: Convert to fraction form
    18,991.95/26,647.05 = 18,991.95/x
  3. Step 3: Cross multiply
    18,991.95x = 26,647.05 × 18,991.95
  4. Step 4: Simplify right side
    18,991.95x = 506,079,441.25
  5. Step 5: Solve for x
    x = 506,079,441.25/18,991.95
  6. Step 6: Final answer
    x = 26,647.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.