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Finding the Fourth Proportional to 12,728.51, 19,100.05 and 7,110.89

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Solution

The fourth proportional to 12,728.51, 19,100.05 and 7,110.89 is: 10,670.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.51 : 19,100.05 = 7,110.89 : x
  2. Step 2: Convert to fraction form
    12,728.51/19,100.05 = 7,110.89/x
  3. Step 3: Cross multiply
    12,728.51x = 19,100.05 × 7,110.89
  4. Step 4: Simplify right side
    12,728.51x = 135,818,354.54
  5. Step 5: Solve for x
    x = 135,818,354.54/12,728.51
  6. Step 6: Final answer
    x = 10,670.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.