Home / 18,923.47-28,396.55-7,830.31

Finding the Fourth Proportional to 18,923.47, 28,396.55 and 7,830.31

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Solution

The fourth proportional to 18,923.47, 28,396.55 and 7,830.31 is: 11,750.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.47 : 28,396.55 = 7,830.31 : x
  2. Step 2: Convert to fraction form
    18,923.47/28,396.55 = 7,830.31/x
  3. Step 3: Cross multiply
    18,923.47x = 28,396.55 × 7,830.31
  4. Step 4: Simplify right side
    18,923.47x = 222,353,789.43
  5. Step 5: Solve for x
    x = 222,353,789.43/18,923.47
  6. Step 6: Final answer
    x = 11,750.16

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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.