Home / 28,020.66-38,668.77-15,445.86

Finding the Fourth Proportional to 28,020.66, 38,668.77 and 15,445.86

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Solution

The fourth proportional to 28,020.66, 38,668.77 and 15,445.86 is: 21,315.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,020.66 : 38,668.77 = 15,445.86 : x
  2. Step 2: Convert to fraction form
    28,020.66/38,668.77 = 15,445.86/x
  3. Step 3: Cross multiply
    28,020.66x = 38,668.77 × 15,445.86
  4. Step 4: Simplify right side
    28,020.66x = 597,272,407.79
  5. Step 5: Solve for x
    x = 597,272,407.79/28,020.66
  6. Step 6: Final answer
    x = 21,315.43

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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.