Home / 20,810.40-28,727.37-13,267.68

Finding the Fourth Proportional to 20,810.40, 28,727.37 and 13,267.68

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Solution

The fourth proportional to 20,810.40, 28,727.37 and 13,267.68 is: 18,315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.40 : 28,727.37 = 13,267.68 : x
  2. Step 2: Convert to fraction form
    20,810.40/28,727.37 = 13,267.68/x
  3. Step 3: Cross multiply
    20,810.40x = 28,727.37 × 13,267.68
  4. Step 4: Simplify right side
    20,810.40x = 381,145,552.40
  5. Step 5: Solve for x
    x = 381,145,552.40/20,810.40
  6. Step 6: Final answer
    x = 18,315.15

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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.