Home / 14,081.22-21,017.93-12,420.90

Finding the Fourth Proportional to 14,081.22, 21,017.93 and 12,420.90

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Solution

The fourth proportional to 14,081.22, 21,017.93 and 12,420.90 is: 18,539.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,081.22 : 21,017.93 = 12,420.90 : x
  2. Step 2: Convert to fraction form
    14,081.22/21,017.93 = 12,420.90/x
  3. Step 3: Cross multiply
    14,081.22x = 21,017.93 × 12,420.90
  4. Step 4: Simplify right side
    14,081.22x = 261,061,544.63
  5. Step 5: Solve for x
    x = 261,061,544.63/14,081.22
  6. Step 6: Final answer
    x = 18,539.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.