Home / 28,545.30-39,430.16-21,912.89

Finding the Fourth Proportional to 28,545.30, 39,430.16 and 21,912.89

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Solution

The fourth proportional to 28,545.30, 39,430.16 and 21,912.89 is: 30,268.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,545.30 : 39,430.16 = 21,912.89 : x
  2. Step 2: Convert to fraction form
    28,545.30/39,430.16 = 21,912.89/x
  3. Step 3: Cross multiply
    28,545.30x = 39,430.16 × 21,912.89
  4. Step 4: Simplify right side
    28,545.30x = 864,028,616.39
  5. Step 5: Solve for x
    x = 864,028,616.39/28,545.30
  6. Step 6: Final answer
    x = 30,268.68

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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.