Home / 28,022.35-38,670.31-15,275.65

Finding the Fourth Proportional to 28,022.35, 38,670.31 and 15,275.65

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Solution

The fourth proportional to 28,022.35, 38,670.31 and 15,275.65 is: 21,080.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,022.35 : 38,670.31 = 15,275.65 : x
  2. Step 2: Convert to fraction form
    28,022.35/38,670.31 = 15,275.65/x
  3. Step 3: Cross multiply
    28,022.35x = 38,670.31 × 15,275.65
  4. Step 4: Simplify right side
    28,022.35x = 590,714,120.95
  5. Step 5: Solve for x
    x = 590,714,120.95/28,022.35
  6. Step 6: Final answer
    x = 21,080.11

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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.