Home / 19,990.31-29,985.56-8,303.54

Finding the Fourth Proportional to 19,990.31, 29,985.56 and 8,303.54

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Solution

The fourth proportional to 19,990.31, 29,985.56 and 8,303.54 is: 12,455.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.31 : 29,985.56 = 8,303.54 : x
  2. Step 2: Convert to fraction form
    19,990.31/29,985.56 = 8,303.54/x
  3. Step 3: Cross multiply
    19,990.31x = 29,985.56 × 8,303.54
  4. Step 4: Simplify right side
    19,990.31x = 248,986,105.44
  5. Step 5: Solve for x
    x = 248,986,105.44/19,990.31
  6. Step 6: Final answer
    x = 12,455.34

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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.