Home / 20,969.87-28,938.74-12,018.15

Finding the Fourth Proportional to 20,969.87, 28,938.74 and 12,018.15

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Solution

The fourth proportional to 20,969.87, 28,938.74 and 12,018.15 is: 16,585.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.87 : 28,938.74 = 12,018.15 : x
  2. Step 2: Convert to fraction form
    20,969.87/28,938.74 = 12,018.15/x
  3. Step 3: Cross multiply
    20,969.87x = 28,938.74 × 12,018.15
  4. Step 4: Simplify right side
    20,969.87x = 347,790,058.04
  5. Step 5: Solve for x
    x = 347,790,058.04/20,969.87
  6. Step 6: Final answer
    x = 16,585.23

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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.