Home / 7,173.40-10,758.84-1,978.12

Finding the Fourth Proportional to 7,173.40, 10,758.84 and 1,978.12

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Solution

The fourth proportional to 7,173.40, 10,758.84 and 1,978.12 is: 2,966.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,173.40 : 10,758.84 = 1,978.12 : x
  2. Step 2: Convert to fraction form
    7,173.40/10,758.84 = 1,978.12/x
  3. Step 3: Cross multiply
    7,173.40x = 10,758.84 × 1,978.12
  4. Step 4: Simplify right side
    7,173.40x = 21,282,276.58
  5. Step 5: Solve for x
    x = 21,282,276.58/7,173.40
  6. Step 6: Final answer
    x = 2,966.83

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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.