Home / 28,908.72-39,898.44-20,986.92

Finding the Fourth Proportional to 28,908.72, 39,898.44 and 20,986.92

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Solution

The fourth proportional to 28,908.72, 39,898.44 and 20,986.92 is: 28,965.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,908.72 : 39,898.44 = 20,986.92 : x
  2. Step 2: Convert to fraction form
    28,908.72/39,898.44 = 20,986.92/x
  3. Step 3: Cross multiply
    28,908.72x = 39,898.44 × 20,986.92
  4. Step 4: Simplify right side
    28,908.72x = 837,345,368.40
  5. Step 5: Solve for x
    x = 837,345,368.40/28,908.72
  6. Step 6: Final answer
    x = 28,965.15

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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.