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Finding the Fourth Proportional to 19,403, 26,774.88 and 11,443.40

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Solution

The fourth proportional to 19,403, 26,774.88 and 11,443.40 is: 15,791.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,403 : 26,774.88 = 11,443.40 : x
  2. Step 2: Convert to fraction form
    19,403/26,774.88 = 11,443.40/x
  3. Step 3: Cross multiply
    19,403x = 26,774.88 × 11,443.40
  4. Step 4: Simplify right side
    19,403x = 306,395,661.79
  5. Step 5: Solve for x
    x = 306,395,661.79/19,403
  6. Step 6: Final answer
    x = 15,791.15

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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.