Home / 28,080.68-42,157.79-18,780.46

Finding the Fourth Proportional to 28,080.68, 42,157.79 and 18,780.46

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Solution

The fourth proportional to 28,080.68, 42,157.79 and 18,780.46 is: 28,195.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080.68 : 42,157.79 = 18,780.46 : x
  2. Step 2: Convert to fraction form
    28,080.68/42,157.79 = 18,780.46/x
  3. Step 3: Cross multiply
    28,080.68x = 42,157.79 × 18,780.46
  4. Step 4: Simplify right side
    28,080.68x = 791,742,688.78
  5. Step 5: Solve for x
    x = 791,742,688.78/28,080.68
  6. Step 6: Final answer
    x = 28,195.28

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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.