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Finding the Fourth Proportional to 18,866.93, 28,312.74 and 7,180.25

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Solution

The fourth proportional to 18,866.93, 28,312.74 and 7,180.25 is: 10,775.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.93 : 28,312.74 = 7,180.25 : x
  2. Step 2: Convert to fraction form
    18,866.93/28,312.74 = 7,180.25/x
  3. Step 3: Cross multiply
    18,866.93x = 28,312.74 × 7,180.25
  4. Step 4: Simplify right side
    18,866.93x = 203,292,409.82
  5. Step 5: Solve for x
    x = 203,292,409.82/18,866.93
  6. Step 6: Final answer
    x = 10,775.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.