Home / 20,989.44-28,973.28-13,918.24

Finding the Fourth Proportional to 20,989.44, 28,973.28 and 13,918.24

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Solution

The fourth proportional to 20,989.44, 28,973.28 and 13,918.24 is: 19,212.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.44 : 28,973.28 = 13,918.24 : x
  2. Step 2: Convert to fraction form
    20,989.44/28,973.28 = 13,918.24/x
  3. Step 3: Cross multiply
    20,989.44x = 28,973.28 × 13,918.24
  4. Step 4: Simplify right side
    20,989.44x = 403,257,064.63
  5. Step 5: Solve for x
    x = 403,257,064.63/20,989.44
  6. Step 6: Final answer
    x = 19,212.38

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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.