Home / 3,875.12-5,347.80-2,106.86

Finding the Fourth Proportional to 3,875.12, 5,347.80 and 2,106.86

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Solution

The fourth proportional to 3,875.12, 5,347.80 and 2,106.86 is: 2,907.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,875.12 : 5,347.80 = 2,106.86 : x
  2. Step 2: Convert to fraction form
    3,875.12/5,347.80 = 2,106.86/x
  3. Step 3: Cross multiply
    3,875.12x = 5,347.80 × 2,106.86
  4. Step 4: Simplify right side
    3,875.12x = 11,267,065.91
  5. Step 5: Solve for x
    x = 11,267,065.91/3,875.12
  6. Step 6: Final answer
    x = 2,907.54

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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.