Home / 20,670.80-28,525.77-12,711.33

Finding the Fourth Proportional to 20,670.80, 28,525.77 and 12,711.33

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Solution

The fourth proportional to 20,670.80, 28,525.77 and 12,711.33 is: 17,541.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.80 : 28,525.77 = 12,711.33 : x
  2. Step 2: Convert to fraction form
    20,670.80/28,525.77 = 12,711.33/x
  3. Step 3: Cross multiply
    20,670.80x = 28,525.77 × 12,711.33
  4. Step 4: Simplify right side
    20,670.80x = 362,600,475.97
  5. Step 5: Solve for x
    x = 362,600,475.97/20,670.80
  6. Step 6: Final answer
    x = 17,541.68

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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.