Home / 20,647.80-28,498.50-13,574.88

Finding the Fourth Proportional to 20,647.80, 28,498.50 and 13,574.88

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Solution

The fourth proportional to 20,647.80, 28,498.50 and 13,574.88 is: 18,736.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.80 : 28,498.50 = 13,574.88 : x
  2. Step 2: Convert to fraction form
    20,647.80/28,498.50 = 13,574.88/x
  3. Step 3: Cross multiply
    20,647.80x = 28,498.50 × 13,574.88
  4. Step 4: Simplify right side
    20,647.80x = 386,863,717.68
  5. Step 5: Solve for x
    x = 386,863,717.68/20,647.80
  6. Step 6: Final answer
    x = 18,736.32

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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.