Home / 20,433.90-28,200.06-11,360.55

Finding the Fourth Proportional to 20,433.90, 28,200.06 and 11,360.55

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Solution

The fourth proportional to 20,433.90, 28,200.06 and 11,360.55 is: 15,678.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,433.90 : 28,200.06 = 11,360.55 : x
  2. Step 2: Convert to fraction form
    20,433.90/28,200.06 = 11,360.55/x
  3. Step 3: Cross multiply
    20,433.90x = 28,200.06 × 11,360.55
  4. Step 4: Simplify right side
    20,433.90x = 320,368,191.63
  5. Step 5: Solve for x
    x = 320,368,191.63/20,433.90
  6. Step 6: Final answer
    x = 15,678.27

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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.