Home / 5,106.32-7,657.86-1,986.12

Finding the Fourth Proportional to 5,106.32, 7,657.86 and 1,986.12

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Solution

The fourth proportional to 5,106.32, 7,657.86 and 1,986.12 is: 2,978.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,106.32 : 7,657.86 = 1,986.12 : x
  2. Step 2: Convert to fraction form
    5,106.32/7,657.86 = 1,986.12/x
  3. Step 3: Cross multiply
    5,106.32x = 7,657.86 × 1,986.12
  4. Step 4: Simplify right side
    5,106.32x = 15,209,428.90
  5. Step 5: Solve for x
    x = 15,209,428.90/5,106.32
  6. Step 6: Final answer
    x = 2,978.55

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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.