Home / 28,930.37-39,947.55-21,385.22

Finding the Fourth Proportional to 28,930.37, 39,947.55 and 21,385.22

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Solution

The fourth proportional to 28,930.37, 39,947.55 and 21,385.22 is: 29,529.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,930.37 : 39,947.55 = 21,385.22 : x
  2. Step 2: Convert to fraction form
    28,930.37/39,947.55 = 21,385.22/x
  3. Step 3: Cross multiply
    28,930.37x = 39,947.55 × 21,385.22
  4. Step 4: Simplify right side
    28,930.37x = 854,287,145.21
  5. Step 5: Solve for x
    x = 854,287,145.21/28,930.37
  6. Step 6: Final answer
    x = 29,529.08

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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.