Home / 20,372.07-28,114.80-11,420.16

Finding the Fourth Proportional to 20,372.07, 28,114.80 and 11,420.16

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Solution

The fourth proportional to 20,372.07, 28,114.80 and 11,420.16 is: 15,760.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.07 : 28,114.80 = 11,420.16 : x
  2. Step 2: Convert to fraction form
    20,372.07/28,114.80 = 11,420.16/x
  3. Step 3: Cross multiply
    20,372.07x = 28,114.80 × 11,420.16
  4. Step 4: Simplify right side
    20,372.07x = 321,075,514.37
  5. Step 5: Solve for x
    x = 321,075,514.37/20,372.07
  6. Step 6: Final answer
    x = 15,760.57

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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.