Home / 20,630.56-28,455.60-12,677.26

Finding the Fourth Proportional to 20,630.56, 28,455.60 and 12,677.26

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Solution

The fourth proportional to 20,630.56, 28,455.60 and 12,677.26 is: 17,485.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.56 : 28,455.60 = 12,677.26 : x
  2. Step 2: Convert to fraction form
    20,630.56/28,455.60 = 12,677.26/x
  3. Step 3: Cross multiply
    20,630.56x = 28,455.60 × 12,677.26
  4. Step 4: Simplify right side
    20,630.56x = 360,739,039.66
  5. Step 5: Solve for x
    x = 360,739,039.66/20,630.56
  6. Step 6: Final answer
    x = 17,485.66

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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.