Home / 20,619.99-28,467.81-13,558.59

Finding the Fourth Proportional to 20,619.99, 28,467.81 and 13,558.59

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Solution

The fourth proportional to 20,619.99, 28,467.81 and 13,558.59 is: 18,718.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.99 : 28,467.81 = 13,558.59 : x
  2. Step 2: Convert to fraction form
    20,619.99/28,467.81 = 13,558.59/x
  3. Step 3: Cross multiply
    20,619.99x = 28,467.81 × 13,558.59
  4. Step 4: Simplify right side
    20,619.99x = 385,983,363.99
  5. Step 5: Solve for x
    x = 385,983,363.99/20,619.99
  6. Step 6: Final answer
    x = 18,718.89

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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.