Home / 28,545.16-39,429.97-21,912.75

Finding the Fourth Proportional to 28,545.16, 39,429.97 and 21,912.75

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Solution

The fourth proportional to 28,545.16, 39,429.97 and 21,912.75 is: 30,268.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,545.16 : 39,429.97 = 21,912.75 : x
  2. Step 2: Convert to fraction form
    28,545.16/39,429.97 = 21,912.75/x
  3. Step 3: Cross multiply
    28,545.16x = 39,429.97 × 21,912.75
  4. Step 4: Simplify right side
    28,545.16x = 864,019,075.12
  5. Step 5: Solve for x
    x = 864,019,075.12/28,545.16
  6. Step 6: Final answer
    x = 30,268.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.