Home / 12,678.89-19,021.67-4,781.52

Finding the Fourth Proportional to 12,678.89, 19,021.67 and 4,781.52

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Solution

The fourth proportional to 12,678.89, 19,021.67 and 4,781.52 is: 7,173.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.89 : 19,021.67 = 4,781.52 : x
  2. Step 2: Convert to fraction form
    12,678.89/19,021.67 = 4,781.52/x
  3. Step 3: Cross multiply
    12,678.89x = 19,021.67 × 4,781.52
  4. Step 4: Simplify right side
    12,678.89x = 90,952,471.63
  5. Step 5: Solve for x
    x = 90,952,471.63/12,678.89
  6. Step 6: Final answer
    x = 7,173.54

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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.