Home / 20,945.16-28,903.94-11,384.84

Finding the Fourth Proportional to 20,945.16, 28,903.94 and 11,384.84

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Solution

The fourth proportional to 20,945.16, 28,903.94 and 11,384.84 is: 15,710.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.16 : 28,903.94 = 11,384.84 : x
  2. Step 2: Convert to fraction form
    20,945.16/28,903.94 = 11,384.84/x
  3. Step 3: Cross multiply
    20,945.16x = 28,903.94 × 11,384.84
  4. Step 4: Simplify right side
    20,945.16x = 329,066,732.27
  5. Step 5: Solve for x
    x = 329,066,732.27/20,945.16
  6. Step 6: Final answer
    x = 15,710.87

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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.