Home / 28,310.91-39,066.36-16,978.30

Finding the Fourth Proportional to 28,310.91, 39,066.36 and 16,978.30

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Solution

The fourth proportional to 28,310.91, 39,066.36 and 16,978.30 is: 23,428.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,310.91 : 39,066.36 = 16,978.30 : x
  2. Step 2: Convert to fraction form
    28,310.91/39,066.36 = 16,978.30/x
  3. Step 3: Cross multiply
    28,310.91x = 39,066.36 × 16,978.30
  4. Step 4: Simplify right side
    28,310.91x = 663,280,379.99
  5. Step 5: Solve for x
    x = 663,280,379.99/28,310.91
  6. Step 6: Final answer
    x = 23,428.44

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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.