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Finding the Fourth Proportional to 19,851.90, 27,390.48 and 11,888.48

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Solution

The fourth proportional to 19,851.90, 27,390.48 and 11,888.48 is: 16,403.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,851.90 : 27,390.48 = 11,888.48 : x
  2. Step 2: Convert to fraction form
    19,851.90/27,390.48 = 11,888.48/x
  3. Step 3: Cross multiply
    19,851.90x = 27,390.48 × 11,888.48
  4. Step 4: Simplify right side
    19,851.90x = 325,631,173.67
  5. Step 5: Solve for x
    x = 325,631,173.67/19,851.90
  6. Step 6: Final answer
    x = 16,403.02

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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.