Home / 20,445.36-30,621.60-18,080.88

Finding the Fourth Proportional to 20,445.36, 30,621.60 and 18,080.88

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Solution

The fourth proportional to 20,445.36, 30,621.60 and 18,080.88 is: 27,080.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.36 : 30,621.60 = 18,080.88 : x
  2. Step 2: Convert to fraction form
    20,445.36/30,621.60 = 18,080.88/x
  3. Step 3: Cross multiply
    20,445.36x = 30,621.60 × 18,080.88
  4. Step 4: Simplify right side
    20,445.36x = 553,665,475.01
  5. Step 5: Solve for x
    x = 553,665,475.01/20,445.36
  6. Step 6: Final answer
    x = 27,080.25

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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.