Home / 20,708.80-28,558.36-13,918.16

Finding the Fourth Proportional to 20,708.80, 28,558.36 and 13,918.16

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Solution

The fourth proportional to 20,708.80, 28,558.36 and 13,918.16 is: 19,193.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.80 : 28,558.36 = 13,918.16 : x
  2. Step 2: Convert to fraction form
    20,708.80/28,558.36 = 13,918.16/x
  3. Step 3: Cross multiply
    20,708.80x = 28,558.36 × 13,918.16
  4. Step 4: Simplify right side
    20,708.80x = 397,479,823.82
  5. Step 5: Solve for x
    x = 397,479,823.82/20,708.80
  6. Step 6: Final answer
    x = 19,193.76

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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.