Home / 20,427.49-28,189.86-11,352.81

Finding the Fourth Proportional to 20,427.49, 28,189.86 and 11,352.81

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Solution

The fourth proportional to 20,427.49, 28,189.86 and 11,352.81 is: 15,666.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.49 : 28,189.86 = 11,352.81 : x
  2. Step 2: Convert to fraction form
    20,427.49/28,189.86 = 11,352.81/x
  3. Step 3: Cross multiply
    20,427.49x = 28,189.86 × 11,352.81
  4. Step 4: Simplify right side
    20,427.49x = 320,034,124.51
  5. Step 5: Solve for x
    x = 320,034,124.51/20,427.49
  6. Step 6: Final answer
    x = 15,666.84

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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.