Home / 20,621.58-28,457.86-11,190.14

Finding the Fourth Proportional to 20,621.58, 28,457.86 and 11,190.14

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Solution

The fourth proportional to 20,621.58, 28,457.86 and 11,190.14 is: 15,442.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.58 : 28,457.86 = 11,190.14 : x
  2. Step 2: Convert to fraction form
    20,621.58/28,457.86 = 11,190.14/x
  3. Step 3: Cross multiply
    20,621.58x = 28,457.86 × 11,190.14
  4. Step 4: Simplify right side
    20,621.58x = 318,447,480.67
  5. Step 5: Solve for x
    x = 318,447,480.67/20,621.58
  6. Step 6: Final answer
    x = 15,442.44

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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.