Home / 20,412.90-28,172.88-12,459.75

Finding the Fourth Proportional to 20,412.90, 28,172.88 and 12,459.75

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Solution

The fourth proportional to 20,412.90, 28,172.88 and 12,459.75 is: 17,196.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.90 : 28,172.88 = 12,459.75 : x
  2. Step 2: Convert to fraction form
    20,412.90/28,172.88 = 12,459.75/x
  3. Step 3: Cross multiply
    20,412.90x = 28,172.88 × 12,459.75
  4. Step 4: Simplify right side
    20,412.90x = 351,027,041.58
  5. Step 5: Solve for x
    x = 351,027,041.58/20,412.90
  6. Step 6: Final answer
    x = 17,196.33

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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.