Home / 30,019.36-45,012.84-21,271.36

Finding the Fourth Proportional to 30,019.36, 45,012.84 and 21,271.36

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Solution

The fourth proportional to 30,019.36, 45,012.84 and 21,271.36 is: 31,895.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,019.36 : 45,012.84 = 21,271.36 : x
  2. Step 2: Convert to fraction form
    30,019.36/45,012.84 = 21,271.36/x
  3. Step 3: Cross multiply
    30,019.36x = 45,012.84 × 21,271.36
  4. Step 4: Simplify right side
    30,019.36x = 957,484,324.26
  5. Step 5: Solve for x
    x = 957,484,324.26/30,019.36
  6. Step 6: Final answer
    x = 31,895.56

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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.