Home / 30,147.18-45,189.71-20,289.28

Finding the Fourth Proportional to 30,147.18, 45,189.71 and 20,289.28

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Solution

The fourth proportional to 30,147.18, 45,189.71 and 20,289.28 is: 30,413.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,147.18 : 45,189.71 = 20,289.28 : x
  2. Step 2: Convert to fraction form
    30,147.18/45,189.71 = 20,289.28/x
  3. Step 3: Cross multiply
    30,147.18x = 45,189.71 × 20,289.28
  4. Step 4: Simplify right side
    30,147.18x = 916,866,453.36
  5. Step 5: Solve for x
    x = 916,866,453.36/30,147.18
  6. Step 6: Final answer
    x = 30,413.01

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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.