Home / 28,409.40-39,207.76-21,226.86

Finding the Fourth Proportional to 28,409.40, 39,207.76 and 21,226.86

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Solution

The fourth proportional to 28,409.40, 39,207.76 and 21,226.86 is: 29,295.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.40 : 39,207.76 = 21,226.86 : x
  2. Step 2: Convert to fraction form
    28,409.40/39,207.76 = 21,226.86/x
  3. Step 3: Cross multiply
    28,409.40x = 39,207.76 × 21,226.86
  4. Step 4: Simplify right side
    28,409.40x = 832,257,579.37
  5. Step 5: Solve for x
    x = 832,257,579.37/28,409.40
  6. Step 6: Final answer
    x = 29,295.15

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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.