Home / 20,431.98-30,606.48-18,730.98

Finding the Fourth Proportional to 20,431.98, 30,606.48 and 18,730.98

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Solution

The fourth proportional to 20,431.98, 30,606.48 and 18,730.98 is: 28,058.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.98 : 30,606.48 = 18,730.98 : x
  2. Step 2: Convert to fraction form
    20,431.98/30,606.48 = 18,730.98/x
  3. Step 3: Cross multiply
    20,431.98x = 30,606.48 × 18,730.98
  4. Step 4: Simplify right side
    20,431.98x = 573,289,364.75
  5. Step 5: Solve for x
    x = 573,289,364.75/20,431.98
  6. Step 6: Final answer
    x = 28,058.43

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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.