Home / 1,539.23-2,121.32-1,113.72

Finding the Fourth Proportional to 1,539.23, 2,121.32 and 1,113.72

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Solution

The fourth proportional to 1,539.23, 2,121.32 and 1,113.72 is: 1,534.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.23 : 2,121.32 = 1,113.72 : x
  2. Step 2: Convert to fraction form
    1,539.23/2,121.32 = 1,113.72/x
  3. Step 3: Cross multiply
    1,539.23x = 2,121.32 × 1,113.72
  4. Step 4: Simplify right side
    1,539.23x = 2,362,550.94
  5. Step 5: Solve for x
    x = 2,362,550.94/1,539.23
  6. Step 6: Final answer
    x = 1,534.90

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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.