Home / 28,031.53-38,686.25-20,945.65

Finding the Fourth Proportional to 28,031.53, 38,686.25 and 20,945.65

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Solution

The fourth proportional to 28,031.53, 38,686.25 and 20,945.65 is: 28,907.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,031.53 : 38,686.25 = 20,945.65 : x
  2. Step 2: Convert to fraction form
    28,031.53/38,686.25 = 20,945.65/x
  3. Step 3: Cross multiply
    28,031.53x = 38,686.25 × 20,945.65
  4. Step 4: Simplify right side
    28,031.53x = 810,308,652.31
  5. Step 5: Solve for x
    x = 810,308,652.31/28,031.53
  6. Step 6: Final answer
    x = 28,907.04

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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.