Home / 28,382.72-39,166.50-20,860.64

Finding the Fourth Proportional to 28,382.72, 39,166.50 and 20,860.64

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Solution

The fourth proportional to 28,382.72, 39,166.50 and 20,860.64 is: 28,786.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.72 : 39,166.50 = 20,860.64 : x
  2. Step 2: Convert to fraction form
    28,382.72/39,166.50 = 20,860.64/x
  3. Step 3: Cross multiply
    28,382.72x = 39,166.50 × 20,860.64
  4. Step 4: Simplify right side
    28,382.72x = 817,038,256.56
  5. Step 5: Solve for x
    x = 817,038,256.56/28,382.72
  6. Step 6: Final answer
    x = 28,786.47

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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.