Home / 20,890.47-28,830.93-11,939.27

Finding the Fourth Proportional to 20,890.47, 28,830.93 and 11,939.27

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Solution

The fourth proportional to 20,890.47, 28,830.93 and 11,939.27 is: 16,477.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.47 : 28,830.93 = 11,939.27 : x
  2. Step 2: Convert to fraction form
    20,890.47/28,830.93 = 11,939.27/x
  3. Step 3: Cross multiply
    20,890.47x = 28,830.93 × 11,939.27
  4. Step 4: Simplify right side
    20,890.47x = 344,220,068.69
  5. Step 5: Solve for x
    x = 344,220,068.69/20,890.47
  6. Step 6: Final answer
    x = 16,477.37

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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.