Home / 13,120.29-19,689.89-6,455.34

Finding the Fourth Proportional to 13,120.29, 19,689.89 and 6,455.34

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Solution

The fourth proportional to 13,120.29, 19,689.89 and 6,455.34 is: 9,687.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.29 : 19,689.89 = 6,455.34 : x
  2. Step 2: Convert to fraction form
    13,120.29/19,689.89 = 6,455.34/x
  3. Step 3: Cross multiply
    13,120.29x = 19,689.89 × 6,455.34
  4. Step 4: Simplify right side
    13,120.29x = 127,104,902.24
  5. Step 5: Solve for x
    x = 127,104,902.24/13,120.29
  6. Step 6: Final answer
    x = 9,687.66

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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.