Home / 20,638.37-28,480.70-11,207

Finding the Fourth Proportional to 20,638.37, 28,480.70 and 11,207

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Solution

The fourth proportional to 20,638.37, 28,480.70 and 11,207 is: 15,465.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.37 : 28,480.70 = 11,207 : x
  2. Step 2: Convert to fraction form
    20,638.37/28,480.70 = 11,207/x
  3. Step 3: Cross multiply
    20,638.37x = 28,480.70 × 11,207
  4. Step 4: Simplify right side
    20,638.37x = 319,183,204.90
  5. Step 5: Solve for x
    x = 319,183,204.90/20,638.37
  6. Step 6: Final answer
    x = 15,465.52

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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.