Home / 20,845.64-31,246.54-7,689.64

Finding the Fourth Proportional to 20,845.64, 31,246.54 and 7,689.64

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Solution

The fourth proportional to 20,845.64, 31,246.54 and 7,689.64 is: 11,526.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.64 : 31,246.54 = 7,689.64 : x
  2. Step 2: Convert to fraction form
    20,845.64/31,246.54 = 7,689.64/x
  3. Step 3: Cross multiply
    20,845.64x = 31,246.54 × 7,689.64
  4. Step 4: Simplify right side
    20,845.64x = 240,274,643.85
  5. Step 5: Solve for x
    x = 240,274,643.85/20,845.64
  6. Step 6: Final answer
    x = 11,526.37

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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.