Home / 28,431.72-39,214.62-20,875.68

Finding the Fourth Proportional to 28,431.72, 39,214.62 and 20,875.68

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Solution

The fourth proportional to 28,431.72, 39,214.62 and 20,875.68 is: 28,792.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.72 : 39,214.62 = 20,875.68 : x
  2. Step 2: Convert to fraction form
    28,431.72/39,214.62 = 20,875.68/x
  3. Step 3: Cross multiply
    28,431.72x = 39,214.62 × 20,875.68
  4. Step 4: Simplify right side
    28,431.72x = 818,631,858.44
  5. Step 5: Solve for x
    x = 818,631,858.44/28,431.72
  6. Step 6: Final answer
    x = 28,792.91

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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.