Home / 28,890.40-39,896.40-18,983.20

Finding the Fourth Proportional to 28,890.40, 39,896.40 and 18,983.20

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Solution

The fourth proportional to 28,890.40, 39,896.40 and 18,983.20 is: 26,214.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,890.40 : 39,896.40 = 18,983.20 : x
  2. Step 2: Convert to fraction form
    28,890.40/39,896.40 = 18,983.20/x
  3. Step 3: Cross multiply
    28,890.40x = 39,896.40 × 18,983.20
  4. Step 4: Simplify right side
    28,890.40x = 757,361,340.48
  5. Step 5: Solve for x
    x = 757,361,340.48/28,890.40
  6. Step 6: Final answer
    x = 26,214.98

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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.