Home / 20,391.77-30,577.27-7,915.37

Finding the Fourth Proportional to 20,391.77, 30,577.27 and 7,915.37

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Solution

The fourth proportional to 20,391.77, 30,577.27 and 7,915.37 is: 11,869.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.77 : 30,577.27 = 7,915.37 : x
  2. Step 2: Convert to fraction form
    20,391.77/30,577.27 = 7,915.37/x
  3. Step 3: Cross multiply
    20,391.77x = 30,577.27 × 7,915.37
  4. Step 4: Simplify right side
    20,391.77x = 242,030,405.64
  5. Step 5: Solve for x
    x = 242,030,405.64/20,391.77
  6. Step 6: Final answer
    x = 11,869.02

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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.