Home / 20,898.90-28,840.49-11,946.60

Finding the Fourth Proportional to 20,898.90, 28,840.49 and 11,946.60

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Solution

The fourth proportional to 20,898.90, 28,840.49 and 11,946.60 is: 16,486.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.90 : 28,840.49 = 11,946.60 : x
  2. Step 2: Convert to fraction form
    20,898.90/28,840.49 = 11,946.60/x
  3. Step 3: Cross multiply
    20,898.90x = 28,840.49 × 11,946.60
  4. Step 4: Simplify right side
    20,898.90x = 344,545,738.10
  5. Step 5: Solve for x
    x = 344,545,738.10/20,898.90
  6. Step 6: Final answer
    x = 16,486.31

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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.