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Finding the Fourth Proportional to 19,455.80, 26,848.16 and 11,914.90

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Solution

The fourth proportional to 19,455.80, 26,848.16 and 11,914.90 is: 16,442.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,455.80 : 26,848.16 = 11,914.90 : x
  2. Step 2: Convert to fraction form
    19,455.80/26,848.16 = 11,914.90/x
  3. Step 3: Cross multiply
    19,455.80x = 26,848.16 × 11,914.90
  4. Step 4: Simplify right side
    19,455.80x = 319,893,059.57
  5. Step 5: Solve for x
    x = 319,893,059.57/19,455.80
  6. Step 6: Final answer
    x = 16,442.05

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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.