Home / 7,821.04-11,731.58-1,978.12

Finding the Fourth Proportional to 7,821.04, 11,731.58 and 1,978.12

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Solution

The fourth proportional to 7,821.04, 11,731.58 and 1,978.12 is: 2,967.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.04 : 11,731.58 = 1,978.12 : x
  2. Step 2: Convert to fraction form
    7,821.04/11,731.58 = 1,978.12/x
  3. Step 3: Cross multiply
    7,821.04x = 11,731.58 × 1,978.12
  4. Step 4: Simplify right side
    7,821.04x = 23,206,473.03
  5. Step 5: Solve for x
    x = 23,206,473.03/7,821.04
  6. Step 6: Final answer
    x = 2,967.19

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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.