Home / 20,986.08-28,962-11,554.80

Finding the Fourth Proportional to 20,986.08, 28,962 and 11,554.80

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Solution

The fourth proportional to 20,986.08, 28,962 and 11,554.80 is: 15,946.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.08 : 28,962 = 11,554.80 : x
  2. Step 2: Convert to fraction form
    20,986.08/28,962 = 11,554.80/x
  3. Step 3: Cross multiply
    20,986.08x = 28,962 × 11,554.80
  4. Step 4: Simplify right side
    20,986.08x = 334,650,117.60
  5. Step 5: Solve for x
    x = 334,650,117.60/20,986.08
  6. Step 6: Final answer
    x = 15,946.29

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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.