Home / 20,990.90-28,918.14-14,606.52

Finding the Fourth Proportional to 20,990.90, 28,918.14 and 14,606.52

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Solution

The fourth proportional to 20,990.90, 28,918.14 and 14,606.52 is: 20,122.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.90 : 28,918.14 = 14,606.52 : x
  2. Step 2: Convert to fraction form
    20,990.90/28,918.14 = 14,606.52/x
  3. Step 3: Cross multiply
    20,990.90x = 28,918.14 × 14,606.52
  4. Step 4: Simplify right side
    20,990.90x = 422,393,390.27
  5. Step 5: Solve for x
    x = 422,393,390.27/20,990.90
  6. Step 6: Final answer
    x = 20,122.70

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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.