Home / 21,651.14-29,881.32-12,219.50

Finding the Fourth Proportional to 21,651.14, 29,881.32 and 12,219.50

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Solution

The fourth proportional to 21,651.14, 29,881.32 and 12,219.50 is: 16,864.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.14 : 29,881.32 = 12,219.50 : x
  2. Step 2: Convert to fraction form
    21,651.14/29,881.32 = 12,219.50/x
  3. Step 3: Cross multiply
    21,651.14x = 29,881.32 × 12,219.50
  4. Step 4: Simplify right side
    21,651.14x = 365,134,789.74
  5. Step 5: Solve for x
    x = 365,134,789.74/21,651.14
  6. Step 6: Final answer
    x = 16,864.46

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1.5x scale

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.