Home / 30,621.42-45,945.09-12,856.05

Finding the Fourth Proportional to 30,621.42, 45,945.09 and 12,856.05

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Solution

The fourth proportional to 30,621.42, 45,945.09 and 12,856.05 is: 19,289.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,621.42 : 45,945.09 = 12,856.05 : x
  2. Step 2: Convert to fraction form
    30,621.42/45,945.09 = 12,856.05/x
  3. Step 3: Cross multiply
    30,621.42x = 45,945.09 × 12,856.05
  4. Step 4: Simplify right side
    30,621.42x = 590,672,374.29
  5. Step 5: Solve for x
    x = 590,672,374.29/30,621.42
  6. Step 6: Final answer
    x = 19,289.52

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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.