Home / 19,077.36-28,621.56-7,978.32

Finding the Fourth Proportional to 19,077.36, 28,621.56 and 7,978.32

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Solution

The fourth proportional to 19,077.36, 28,621.56 and 7,978.32 is: 11,969.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,077.36 : 28,621.56 = 7,978.32 : x
  2. Step 2: Convert to fraction form
    19,077.36/28,621.56 = 7,978.32/x
  3. Step 3: Cross multiply
    19,077.36x = 28,621.56 × 7,978.32
  4. Step 4: Simplify right side
    19,077.36x = 228,351,964.58
  5. Step 5: Solve for x
    x = 228,351,964.58/19,077.36
  6. Step 6: Final answer
    x = 11,969.79

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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.