Home / 2,128.10-3,192.15-1,539.50

Finding the Fourth Proportional to 2,128.10, 3,192.15 and 1,539.50

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Solution

The fourth proportional to 2,128.10, 3,192.15 and 1,539.50 is: 2,309.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.10 : 3,192.15 = 1,539.50 : x
  2. Step 2: Convert to fraction form
    2,128.10/3,192.15 = 1,539.50/x
  3. Step 3: Cross multiply
    2,128.10x = 3,192.15 × 1,539.50
  4. Step 4: Simplify right side
    2,128.10x = 4,914,314.93
  5. Step 5: Solve for x
    x = 4,914,314.93/2,128.10
  6. Step 6: Final answer
    x = 2,309.25

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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.