Home / 28,020-38,668.43-15,445.56

Finding the Fourth Proportional to 28,020, 38,668.43 and 15,445.56

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Solution

The fourth proportional to 28,020, 38,668.43 and 15,445.56 is: 21,315.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,020 : 38,668.43 = 15,445.56 : x
  2. Step 2: Convert to fraction form
    28,020/38,668.43 = 15,445.56/x
  3. Step 3: Cross multiply
    28,020x = 38,668.43 × 15,445.56
  4. Step 4: Simplify right side
    28,020x = 597,255,478.44
  5. Step 5: Solve for x
    x = 597,255,478.44/28,020
  6. Step 6: Final answer
    x = 21,315.33

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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.