Home / 20,419.98-28,185.69-11,924.40

Finding the Fourth Proportional to 20,419.98, 28,185.69 and 11,924.40

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Solution

The fourth proportional to 20,419.98, 28,185.69 and 11,924.40 is: 16,459.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.98 : 28,185.69 = 11,924.40 : x
  2. Step 2: Convert to fraction form
    20,419.98/28,185.69 = 11,924.40/x
  3. Step 3: Cross multiply
    20,419.98x = 28,185.69 × 11,924.40
  4. Step 4: Simplify right side
    20,419.98x = 336,097,441.84
  5. Step 5: Solve for x
    x = 336,097,441.84/20,419.98
  6. Step 6: Final answer
    x = 16,459.24

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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.