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Finding the Fourth Proportional to 18,895.95, 26,080.02 and 12,511.28

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Solution

The fourth proportional to 18,895.95, 26,080.02 and 12,511.28 is: 17,267.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,895.95 : 26,080.02 = 12,511.28 : x
  2. Step 2: Convert to fraction form
    18,895.95/26,080.02 = 12,511.28/x
  3. Step 3: Cross multiply
    18,895.95x = 26,080.02 × 12,511.28
  4. Step 4: Simplify right side
    18,895.95x = 326,294,400.03
  5. Step 5: Solve for x
    x = 326,294,400.03/18,895.95
  6. Step 6: Final answer
    x = 17,267.96

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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.