Home / 28,485.45-39,283.92-21,758.58

Finding the Fourth Proportional to 28,485.45, 39,283.92 and 21,758.58

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Solution

The fourth proportional to 28,485.45, 39,283.92 and 21,758.58 is: 30,006.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.45 : 39,283.92 = 21,758.58 : x
  2. Step 2: Convert to fraction form
    28,485.45/39,283.92 = 21,758.58/x
  3. Step 3: Cross multiply
    28,485.45x = 39,283.92 × 21,758.58
  4. Step 4: Simplify right side
    28,485.45x = 854,762,316.03
  5. Step 5: Solve for x
    x = 854,762,316.03/28,485.45
  6. Step 6: Final answer
    x = 30,006.98

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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.