Home / 28,520.48-39,317.10-19,553.78

Finding the Fourth Proportional to 28,520.48, 39,317.10 and 19,553.78

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Solution

The fourth proportional to 28,520.48, 39,317.10 and 19,553.78 is: 26,955.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.48 : 39,317.10 = 19,553.78 : x
  2. Step 2: Convert to fraction form
    28,520.48/39,317.10 = 19,553.78/x
  3. Step 3: Cross multiply
    28,520.48x = 39,317.10 × 19,553.78
  4. Step 4: Simplify right side
    28,520.48x = 768,797,948.60
  5. Step 5: Solve for x
    x = 768,797,948.60/28,520.48
  6. Step 6: Final answer
    x = 26,955.99

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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.