Home / 28,678.68-39,577.32-18,611.28

Finding the Fourth Proportional to 28,678.68, 39,577.32 and 18,611.28

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Solution

The fourth proportional to 28,678.68, 39,577.32 and 18,611.28 is: 25,684.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,678.68 : 39,577.32 = 18,611.28 : x
  2. Step 2: Convert to fraction form
    28,678.68/39,577.32 = 18,611.28/x
  3. Step 3: Cross multiply
    28,678.68x = 39,577.32 × 18,611.28
  4. Step 4: Simplify right side
    28,678.68x = 736,584,584.17
  5. Step 5: Solve for x
    x = 736,584,584.17/28,678.68
  6. Step 6: Final answer
    x = 25,684.05

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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.