Home / 15,520.05-21,414.51-14,986.67

Finding the Fourth Proportional to 15,520.05, 21,414.51 and 14,986.67

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Solution

The fourth proportional to 15,520.05, 21,414.51 and 14,986.67 is: 20,678.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.05 : 21,414.51 = 14,986.67 : x
  2. Step 2: Convert to fraction form
    15,520.05/21,414.51 = 14,986.67/x
  3. Step 3: Cross multiply
    15,520.05x = 21,414.51 × 14,986.67
  4. Step 4: Simplify right side
    15,520.05x = 320,932,087.51
  5. Step 5: Solve for x
    x = 320,932,087.51/15,520.05
  6. Step 6: Final answer
    x = 20,678.55

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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.