Home / 20,588.52-28,412.16-11,157.09

Finding the Fourth Proportional to 20,588.52, 28,412.16 and 11,157.09

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Solution

The fourth proportional to 20,588.52, 28,412.16 and 11,157.09 is: 15,396.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,588.52 : 28,412.16 = 11,157.09 : x
  2. Step 2: Convert to fraction form
    20,588.52/28,412.16 = 11,157.09/x
  3. Step 3: Cross multiply
    20,588.52x = 28,412.16 × 11,157.09
  4. Step 4: Simplify right side
    20,588.52x = 316,996,828.37
  5. Step 5: Solve for x
    x = 316,996,828.37/20,588.52
  6. Step 6: Final answer
    x = 15,396.78

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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.