Home / 28,205.72-38,923.89-15,632.90

Finding the Fourth Proportional to 28,205.72, 38,923.89 and 15,632.90

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Solution

The fourth proportional to 28,205.72, 38,923.89 and 15,632.90 is: 21,573.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,205.72 : 38,923.89 = 15,632.90 : x
  2. Step 2: Convert to fraction form
    28,205.72/38,923.89 = 15,632.90/x
  3. Step 3: Cross multiply
    28,205.72x = 38,923.89 × 15,632.90
  4. Step 4: Simplify right side
    28,205.72x = 608,493,260.64
  5. Step 5: Solve for x
    x = 608,493,260.64/28,205.72
  6. Step 6: Final answer
    x = 21,573.40

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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.