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Finding the Fourth Proportional to 18,928.95, 26,108.06 and 12,211.17

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Solution

The fourth proportional to 18,928.95, 26,108.06 and 12,211.17 is: 16,842.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928.95 : 26,108.06 = 12,211.17 : x
  2. Step 2: Convert to fraction form
    18,928.95/26,108.06 = 12,211.17/x
  3. Step 3: Cross multiply
    18,928.95x = 26,108.06 × 12,211.17
  4. Step 4: Simplify right side
    18,928.95x = 318,809,897.97
  5. Step 5: Solve for x
    x = 318,809,897.97/18,928.95
  6. Step 6: Final answer
    x = 16,842.45

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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.