Home / 20,369.90-28,111.25-11,417.46

Finding the Fourth Proportional to 20,369.90, 28,111.25 and 11,417.46

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Solution

The fourth proportional to 20,369.90, 28,111.25 and 11,417.46 is: 15,756.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,369.90 : 28,111.25 = 11,417.46 : x
  2. Step 2: Convert to fraction form
    20,369.90/28,111.25 = 11,417.46/x
  3. Step 3: Cross multiply
    20,369.90x = 28,111.25 × 11,417.46
  4. Step 4: Simplify right side
    20,369.90x = 320,959,072.43
  5. Step 5: Solve for x
    x = 320,959,072.43/20,369.90
  6. Step 6: Final answer
    x = 15,756.54

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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.