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Finding the Fourth Proportional to 19,403.68, 26,775 and 13,028.98

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Solution

The fourth proportional to 19,403.68, 26,775 and 13,028.98 is: 17,978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,403.68 : 26,775 = 13,028.98 : x
  2. Step 2: Convert to fraction form
    19,403.68/26,775 = 13,028.98/x
  3. Step 3: Cross multiply
    19,403.68x = 26,775 × 13,028.98
  4. Step 4: Simplify right side
    19,403.68x = 348,850,939.50
  5. Step 5: Solve for x
    x = 348,850,939.50/19,403.68
  6. Step 6: Final answer
    x = 17,978.60

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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.