Home / 20,637.57-28,503.27-13,911.60

Finding the Fourth Proportional to 20,637.57, 28,503.27 and 13,911.60

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Solution

The fourth proportional to 20,637.57, 28,503.27 and 13,911.60 is: 19,213.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.57 : 28,503.27 = 13,911.60 : x
  2. Step 2: Convert to fraction form
    20,637.57/28,503.27 = 13,911.60/x
  3. Step 3: Cross multiply
    20,637.57x = 28,503.27 × 13,911.60
  4. Step 4: Simplify right side
    20,637.57x = 396,526,090.93
  5. Step 5: Solve for x
    x = 396,526,090.93/20,637.57
  6. Step 6: Final answer
    x = 19,213.80

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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.