Home / 20,114.40-30,139.20-16,809.60

Finding the Fourth Proportional to 20,114.40, 30,139.20 and 16,809.60

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Solution

The fourth proportional to 20,114.40, 30,139.20 and 16,809.60 is: 25,187.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,114.40 : 30,139.20 = 16,809.60 : x
  2. Step 2: Convert to fraction form
    20,114.40/30,139.20 = 16,809.60/x
  3. Step 3: Cross multiply
    20,114.40x = 30,139.20 × 16,809.60
  4. Step 4: Simplify right side
    20,114.40x = 506,627,896.32
  5. Step 5: Solve for x
    x = 506,627,896.32/20,114.40
  6. Step 6: Final answer
    x = 25,187.32

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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.