Home / 13,998.72-19,315.20-10,640.64

Finding the Fourth Proportional to 13,998.72, 19,315.20 and 10,640.64

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Solution

The fourth proportional to 13,998.72, 19,315.20 and 10,640.64 is: 14,681.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.72 : 19,315.20 = 10,640.64 : x
  2. Step 2: Convert to fraction form
    13,998.72/19,315.20 = 10,640.64/x
  3. Step 3: Cross multiply
    13,998.72x = 19,315.20 × 10,640.64
  4. Step 4: Simplify right side
    13,998.72x = 205,526,089.73
  5. Step 5: Solve for x
    x = 205,526,089.73/13,998.72
  6. Step 6: Final answer
    x = 14,681.78

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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.