Home / 28,020.75-38,668.64-15,445.77

Finding the Fourth Proportional to 28,020.75, 38,668.64 and 15,445.77

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Solution

The fourth proportional to 28,020.75, 38,668.64 and 15,445.77 is: 21,315.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,020.75 : 38,668.64 = 15,445.77 : x
  2. Step 2: Convert to fraction form
    28,020.75/38,668.64 = 15,445.77/x
  3. Step 3: Cross multiply
    28,020.75x = 38,668.64 × 15,445.77
  4. Step 4: Simplify right side
    28,020.75x = 597,266,842.42
  5. Step 5: Solve for x
    x = 597,266,842.42/28,020.75
  6. Step 6: Final answer
    x = 21,315.16

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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.