Home / 7,985.78-11,020.31-4,448.91

Finding the Fourth Proportional to 7,985.78, 11,020.31 and 4,448.91

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Solution

The fourth proportional to 7,985.78, 11,020.31 and 4,448.91 is: 6,139.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.78 : 11,020.31 = 4,448.91 : x
  2. Step 2: Convert to fraction form
    7,985.78/11,020.31 = 4,448.91/x
  3. Step 3: Cross multiply
    7,985.78x = 11,020.31 × 4,448.91
  4. Step 4: Simplify right side
    7,985.78x = 49,028,345.12
  5. Step 5: Solve for x
    x = 49,028,345.12/7,985.78
  6. Step 6: Final answer
    x = 6,139.46

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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.