Home / 21,977.18-30,328.66-11,905.62

Finding the Fourth Proportional to 21,977.18, 30,328.66 and 11,905.62

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Solution

The fourth proportional to 21,977.18, 30,328.66 and 11,905.62 is: 16,429.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977.18 : 30,328.66 = 11,905.62 : x
  2. Step 2: Convert to fraction form
    21,977.18/30,328.66 = 11,905.62/x
  3. Step 3: Cross multiply
    21,977.18x = 30,328.66 × 11,905.62
  4. Step 4: Simplify right side
    21,977.18x = 361,081,501.07
  5. Step 5: Solve for x
    x = 361,081,501.07/21,977.18
  6. Step 6: Final answer
    x = 16,429.84

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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.