Home / 13,986.72-21,056.63-12,762

Finding the Fourth Proportional to 13,986.72, 21,056.63 and 12,762

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Solution

The fourth proportional to 13,986.72, 21,056.63 and 12,762 is: 19,212.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.72 : 21,056.63 = 12,762 : x
  2. Step 2: Convert to fraction form
    13,986.72/21,056.63 = 12,762/x
  3. Step 3: Cross multiply
    13,986.72x = 21,056.63 × 12,762
  4. Step 4: Simplify right side
    13,986.72x = 268,724,712.06
  5. Step 5: Solve for x
    x = 268,724,712.06/13,986.72
  6. Step 6: Final answer
    x = 19,212.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.