Home / 20,412.52-28,172.36-12,459.37

Finding the Fourth Proportional to 20,412.52, 28,172.36 and 12,459.37

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Solution

The fourth proportional to 20,412.52, 28,172.36 and 12,459.37 is: 17,195.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.52 : 28,172.36 = 12,459.37 : x
  2. Step 2: Convert to fraction form
    20,412.52/28,172.36 = 12,459.37/x
  3. Step 3: Cross multiply
    20,412.52x = 28,172.36 × 12,459.37
  4. Step 4: Simplify right side
    20,412.52x = 351,009,800.47
  5. Step 5: Solve for x
    x = 351,009,800.47/20,412.52
  6. Step 6: Final answer
    x = 17,195.81

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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.