Home / 28,490.94-39,317.40-15,744.78

Finding the Fourth Proportional to 28,490.94, 39,317.40 and 15,744.78

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Solution

The fourth proportional to 28,490.94, 39,317.40 and 15,744.78 is: 21,727.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.94 : 39,317.40 = 15,744.78 : x
  2. Step 2: Convert to fraction form
    28,490.94/39,317.40 = 15,744.78/x
  3. Step 3: Cross multiply
    28,490.94x = 39,317.40 × 15,744.78
  4. Step 4: Simplify right side
    28,490.94x = 619,043,813.17
  5. Step 5: Solve for x
    x = 619,043,813.17/28,490.94
  6. Step 6: Final answer
    x = 21,727.74

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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.