Home / 13,775.56-19,003.90-9,990.40

Finding the Fourth Proportional to 13,775.56, 19,003.90 and 9,990.40

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Solution

The fourth proportional to 13,775.56, 19,003.90 and 9,990.40 is: 13,782.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,775.56 : 19,003.90 = 9,990.40 : x
  2. Step 2: Convert to fraction form
    13,775.56/19,003.90 = 9,990.40/x
  3. Step 3: Cross multiply
    13,775.56x = 19,003.90 × 9,990.40
  4. Step 4: Simplify right side
    13,775.56x = 189,856,562.56
  5. Step 5: Solve for x
    x = 189,856,562.56/13,775.56
  6. Step 6: Final answer
    x = 13,782.13

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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.