Home / 13,990.09-21,061.73-12,765.37

Finding the Fourth Proportional to 13,990.09, 21,061.73 and 12,765.37

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Solution

The fourth proportional to 13,990.09, 21,061.73 and 12,765.37 is: 19,217.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.09 : 21,061.73 = 12,765.37 : x
  2. Step 2: Convert to fraction form
    13,990.09/21,061.73 = 12,765.37/x
  3. Step 3: Cross multiply
    13,990.09x = 21,061.73 × 12,765.37
  4. Step 4: Simplify right side
    13,990.09x = 268,860,659.81
  5. Step 5: Solve for x
    x = 268,860,659.81/13,990.09
  6. Step 6: Final answer
    x = 19,217.94

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1.5x scale

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.