Home / 2,130.12-2,942.19-1,539.72

Finding the Fourth Proportional to 2,130.12, 2,942.19 and 1,539.72

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Solution

The fourth proportional to 2,130.12, 2,942.19 and 1,539.72 is: 2,126.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.12 : 2,942.19 = 1,539.72 : x
  2. Step 2: Convert to fraction form
    2,130.12/2,942.19 = 1,539.72/x
  3. Step 3: Cross multiply
    2,130.12x = 2,942.19 × 1,539.72
  4. Step 4: Simplify right side
    2,130.12x = 4,530,148.79
  5. Step 5: Solve for x
    x = 4,530,148.79/2,130.12
  6. Step 6: Final answer
    x = 2,126.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.