Home / 28,187.08-38,898.08-15,611.83

Finding the Fourth Proportional to 28,187.08, 38,898.08 and 15,611.83

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Solution

The fourth proportional to 28,187.08, 38,898.08 and 15,611.83 is: 21,544.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,187.08 : 38,898.08 = 15,611.83 : x
  2. Step 2: Convert to fraction form
    28,187.08/38,898.08 = 15,611.83/x
  3. Step 3: Cross multiply
    28,187.08x = 38,898.08 × 15,611.83
  4. Step 4: Simplify right side
    28,187.08x = 607,270,212.29
  5. Step 5: Solve for x
    x = 607,270,212.29/28,187.08
  6. Step 6: Final answer
    x = 21,544.28

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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.