Home / 15,660.84-21,599.40-13,768.42

Finding the Fourth Proportional to 15,660.84, 21,599.40 and 13,768.42

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Solution

The fourth proportional to 15,660.84, 21,599.40 and 13,768.42 is: 18,989.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.84 : 21,599.40 = 13,768.42 : x
  2. Step 2: Convert to fraction form
    15,660.84/21,599.40 = 13,768.42/x
  3. Step 3: Cross multiply
    15,660.84x = 21,599.40 × 13,768.42
  4. Step 4: Simplify right side
    15,660.84x = 297,389,610.95
  5. Step 5: Solve for x
    x = 297,389,610.95/15,660.84
  6. Step 6: Final answer
    x = 18,989.38

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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.