Home / 15,271.78-21,074.70-8,984.56

Finding the Fourth Proportional to 15,271.78, 21,074.70 and 8,984.56

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Solution

The fourth proportional to 15,271.78, 21,074.70 and 8,984.56 is: 12,398.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,271.78 : 21,074.70 = 8,984.56 : x
  2. Step 2: Convert to fraction form
    15,271.78/21,074.70 = 8,984.56/x
  3. Step 3: Cross multiply
    15,271.78x = 21,074.70 × 8,984.56
  4. Step 4: Simplify right side
    15,271.78x = 189,346,906.63
  5. Step 5: Solve for x
    x = 189,346,906.63/15,271.78
  6. Step 6: Final answer
    x = 12,398.48

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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.