Home / 7,081.12-10,621.66-1,887

Finding the Fourth Proportional to 7,081.12, 10,621.66 and 1,887

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Solution

The fourth proportional to 7,081.12, 10,621.66 and 1,887 is: 2,830.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,081.12 : 10,621.66 = 1,887 : x
  2. Step 2: Convert to fraction form
    7,081.12/10,621.66 = 1,887/x
  3. Step 3: Cross multiply
    7,081.12x = 10,621.66 × 1,887
  4. Step 4: Simplify right side
    7,081.12x = 20,043,072.42
  5. Step 5: Solve for x
    x = 20,043,072.42/7,081.12
  6. Step 6: Final answer
    x = 2,830.49

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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.