Home / 20,700.09-28,556.42-12,739.41

Finding the Fourth Proportional to 20,700.09, 28,556.42 and 12,739.41

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Solution

The fourth proportional to 20,700.09, 28,556.42 and 12,739.41 is: 17,574.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.09 : 28,556.42 = 12,739.41 : x
  2. Step 2: Convert to fraction form
    20,700.09/28,556.42 = 12,739.41/x
  3. Step 3: Cross multiply
    20,700.09x = 28,556.42 × 12,739.41
  4. Step 4: Simplify right side
    20,700.09x = 363,791,878.82
  5. Step 5: Solve for x
    x = 363,791,878.82/20,700.09
  6. Step 6: Final answer
    x = 17,574.41

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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.