Home / 20,772.37-28,665.70-11,340.93

Finding the Fourth Proportional to 20,772.37, 28,665.70 and 11,340.93

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Solution

The fourth proportional to 20,772.37, 28,665.70 and 11,340.93 is: 15,650.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.37 : 28,665.70 = 11,340.93 : x
  2. Step 2: Convert to fraction form
    20,772.37/28,665.70 = 11,340.93/x
  3. Step 3: Cross multiply
    20,772.37x = 28,665.70 × 11,340.93
  4. Step 4: Simplify right side
    20,772.37x = 325,095,697.10
  5. Step 5: Solve for x
    x = 325,095,697.10/20,772.37
  6. Step 6: Final answer
    x = 15,650.39

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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.