Home / 30,219.60-45,329.40-19,138.80

Finding the Fourth Proportional to 30,219.60, 45,329.40 and 19,138.80

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Solution

The fourth proportional to 30,219.60, 45,329.40 and 19,138.80 is: 28,708.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,219.60 : 45,329.40 = 19,138.80 : x
  2. Step 2: Convert to fraction form
    30,219.60/45,329.40 = 19,138.80/x
  3. Step 3: Cross multiply
    30,219.60x = 45,329.40 × 19,138.80
  4. Step 4: Simplify right side
    30,219.60x = 867,550,320.72
  5. Step 5: Solve for x
    x = 867,550,320.72/30,219.60
  6. Step 6: Final answer
    x = 28,708.20

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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.