Home / 20,409.48-28,164.60-11,457.36

Finding the Fourth Proportional to 20,409.48, 28,164.60 and 11,457.36

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Solution

The fourth proportional to 20,409.48, 28,164.60 and 11,457.36 is: 15,810.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.48 : 28,164.60 = 11,457.36 : x
  2. Step 2: Convert to fraction form
    20,409.48/28,164.60 = 11,457.36/x
  3. Step 3: Cross multiply
    20,409.48x = 28,164.60 × 11,457.36
  4. Step 4: Simplify right side
    20,409.48x = 322,691,961.46
  5. Step 5: Solve for x
    x = 322,691,961.46/20,409.48
  6. Step 6: Final answer
    x = 15,810.89

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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.