Home / 20,405.55-28,158.93-11,453.43

Finding the Fourth Proportional to 20,405.55, 28,158.93 and 11,453.43

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Solution

The fourth proportional to 20,405.55, 28,158.93 and 11,453.43 is: 15,805.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.55 : 28,158.93 = 11,453.43 : x
  2. Step 2: Convert to fraction form
    20,405.55/28,158.93 = 11,453.43/x
  3. Step 3: Cross multiply
    20,405.55x = 28,158.93 × 11,453.43
  4. Step 4: Simplify right side
    20,405.55x = 322,516,333.63
  5. Step 5: Solve for x
    x = 322,516,333.63/20,405.55
  6. Step 6: Final answer
    x = 15,805.32

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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.