Home / 20,868.41-28,798.21-11,308.09

Finding the Fourth Proportional to 20,868.41, 28,798.21 and 11,308.09

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Solution

The fourth proportional to 20,868.41, 28,798.21 and 11,308.09 is: 15,605.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.41 : 28,798.21 = 11,308.09 : x
  2. Step 2: Convert to fraction form
    20,868.41/28,798.21 = 11,308.09/x
  3. Step 3: Cross multiply
    20,868.41x = 28,798.21 × 11,308.09
  4. Step 4: Simplify right side
    20,868.41x = 325,652,549.99
  5. Step 5: Solve for x
    x = 325,652,549.99/20,868.41
  6. Step 6: Final answer
    x = 15,605.05

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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.