Home / 18,921.41-28,381.81-6,450.12

Finding the Fourth Proportional to 18,921.41, 28,381.81 and 6,450.12

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Solution

The fourth proportional to 18,921.41, 28,381.81 and 6,450.12 is: 9,675.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.41 : 28,381.81 = 6,450.12 : x
  2. Step 2: Convert to fraction form
    18,921.41/28,381.81 = 6,450.12/x
  3. Step 3: Cross multiply
    18,921.41x = 28,381.81 × 6,450.12
  4. Step 4: Simplify right side
    18,921.41x = 183,066,080.32
  5. Step 5: Solve for x
    x = 183,066,080.32/18,921.41
  6. Step 6: Final answer
    x = 9,675.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.