Home / 20,642.16-28,485.58-11,689.60

Finding the Fourth Proportional to 20,642.16, 28,485.58 and 11,689.60

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Solution

The fourth proportional to 20,642.16, 28,485.58 and 11,689.60 is: 16,131.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.16 : 28,485.58 = 11,689.60 : x
  2. Step 2: Convert to fraction form
    20,642.16/28,485.58 = 11,689.60/x
  3. Step 3: Cross multiply
    20,642.16x = 28,485.58 × 11,689.60
  4. Step 4: Simplify right side
    20,642.16x = 332,985,035.97
  5. Step 5: Solve for x
    x = 332,985,035.97/20,642.16
  6. Step 6: Final answer
    x = 16,131.31

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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.