Home / 20,997.63-28,959.53-15,326.01

Finding the Fourth Proportional to 20,997.63, 28,959.53 and 15,326.01

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Solution

The fourth proportional to 20,997.63, 28,959.53 and 15,326.01 is: 21,137.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.63 : 28,959.53 = 15,326.01 : x
  2. Step 2: Convert to fraction form
    20,997.63/28,959.53 = 15,326.01/x
  3. Step 3: Cross multiply
    20,997.63x = 28,959.53 × 15,326.01
  4. Step 4: Simplify right side
    20,997.63x = 443,833,969.75
  5. Step 5: Solve for x
    x = 443,833,969.75/20,997.63
  6. Step 6: Final answer
    x = 21,137.34

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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.