Home / 28,420.92-39,209.40-18,865.44

Finding the Fourth Proportional to 28,420.92, 39,209.40 and 18,865.44

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Solution

The fourth proportional to 28,420.92, 39,209.40 and 18,865.44 is: 26,026.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.92 : 39,209.40 = 18,865.44 : x
  2. Step 2: Convert to fraction form
    28,420.92/39,209.40 = 18,865.44/x
  3. Step 3: Cross multiply
    28,420.92x = 39,209.40 × 18,865.44
  4. Step 4: Simplify right side
    28,420.92x = 739,702,583.14
  5. Step 5: Solve for x
    x = 739,702,583.14/28,420.92
  6. Step 6: Final answer
    x = 26,026.69

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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.