Home / 20,908.80-28,868.40-14,623.20

Finding the Fourth Proportional to 20,908.80, 28,868.40 and 14,623.20

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Solution

The fourth proportional to 20,908.80, 28,868.40 and 14,623.20 is: 20,189.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.80 : 28,868.40 = 14,623.20 : x
  2. Step 2: Convert to fraction form
    20,908.80/28,868.40 = 14,623.20/x
  3. Step 3: Cross multiply
    20,908.80x = 28,868.40 × 14,623.20
  4. Step 4: Simplify right side
    20,908.80x = 422,148,386.88
  5. Step 5: Solve for x
    x = 422,148,386.88/20,908.80
  6. Step 6: Final answer
    x = 20,189.99

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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.