Home / 28,478.72-39,296.96-16,378.56

Finding the Fourth Proportional to 28,478.72, 39,296.96 and 16,378.56

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Solution

The fourth proportional to 28,478.72, 39,296.96 and 16,378.56 is: 22,600.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.72 : 39,296.96 = 16,378.56 : x
  2. Step 2: Convert to fraction form
    28,478.72/39,296.96 = 16,378.56/x
  3. Step 3: Cross multiply
    28,478.72x = 39,296.96 × 16,378.56
  4. Step 4: Simplify right side
    28,478.72x = 643,627,617.18
  5. Step 5: Solve for x
    x = 643,627,617.18/28,478.72
  6. Step 6: Final answer
    x = 22,600.30

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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.