Home / 21,004.86-28,986.44-11,445.15

Finding the Fourth Proportional to 21,004.86, 28,986.44 and 11,445.15

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Solution

The fourth proportional to 21,004.86, 28,986.44 and 11,445.15 is: 15,794.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.86 : 28,986.44 = 11,445.15 : x
  2. Step 2: Convert to fraction form
    21,004.86/28,986.44 = 11,445.15/x
  3. Step 3: Cross multiply
    21,004.86x = 28,986.44 × 11,445.15
  4. Step 4: Simplify right side
    21,004.86x = 331,754,154.85
  5. Step 5: Solve for x
    x = 331,754,154.85/21,004.86
  6. Step 6: Final answer
    x = 15,794.16

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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.