Home / 30,145.20-45,217.80-19,647.60

Finding the Fourth Proportional to 30,145.20, 45,217.80 and 19,647.60

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Solution

The fourth proportional to 30,145.20, 45,217.80 and 19,647.60 is: 29,471.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,145.20 : 45,217.80 = 19,647.60 : x
  2. Step 2: Convert to fraction form
    30,145.20/45,217.80 = 19,647.60/x
  3. Step 3: Cross multiply
    30,145.20x = 45,217.80 × 19,647.60
  4. Step 4: Simplify right side
    30,145.20x = 888,421,247.28
  5. Step 5: Solve for x
    x = 888,421,247.28/30,145.20
  6. Step 6: Final answer
    x = 29,471.40

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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.