Home / 7,181.60-10,772.64-1,987.04

Finding the Fourth Proportional to 7,181.60, 10,772.64 and 1,987.04

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Solution

The fourth proportional to 7,181.60, 10,772.64 and 1,987.04 is: 2,980.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,181.60 : 10,772.64 = 1,987.04 : x
  2. Step 2: Convert to fraction form
    7,181.60/10,772.64 = 1,987.04/x
  3. Step 3: Cross multiply
    7,181.60x = 10,772.64 × 1,987.04
  4. Step 4: Simplify right side
    7,181.60x = 21,405,666.59
  5. Step 5: Solve for x
    x = 21,405,666.59/7,181.60
  6. Step 6: Final answer
    x = 2,980.63

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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.