Home / 20,485.08-30,720.24-13,916.88

Finding the Fourth Proportional to 20,485.08, 30,720.24 and 13,916.88

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Solution

The fourth proportional to 20,485.08, 30,720.24 and 13,916.88 is: 20,870.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.08 : 30,720.24 = 13,916.88 : x
  2. Step 2: Convert to fraction form
    20,485.08/30,720.24 = 13,916.88/x
  3. Step 3: Cross multiply
    20,485.08x = 30,720.24 × 13,916.88
  4. Step 4: Simplify right side
    20,485.08x = 427,529,893.65
  5. Step 5: Solve for x
    x = 427,529,893.65/20,485.08
  6. Step 6: Final answer
    x = 20,870.31

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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.