Home / 20,415.19-28,170.84-12,459.37

Finding the Fourth Proportional to 20,415.19, 28,170.84 and 12,459.37

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Solution

The fourth proportional to 20,415.19, 28,170.84 and 12,459.37 is: 17,192.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.19 : 28,170.84 = 12,459.37 : x
  2. Step 2: Convert to fraction form
    20,415.19/28,170.84 = 12,459.37/x
  3. Step 3: Cross multiply
    20,415.19x = 28,170.84 × 12,459.37
  4. Step 4: Simplify right side
    20,415.19x = 350,990,918.77
  5. Step 5: Solve for x
    x = 350,990,918.77/20,415.19
  6. Step 6: Final answer
    x = 17,192.64

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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.