Home / 20,621.29-28,457.71-11,189.85

Finding the Fourth Proportional to 20,621.29, 28,457.71 and 11,189.85

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Solution

The fourth proportional to 20,621.29, 28,457.71 and 11,189.85 is: 15,442.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.29 : 28,457.71 = 11,189.85 : x
  2. Step 2: Convert to fraction form
    20,621.29/28,457.71 = 11,189.85/x
  3. Step 3: Cross multiply
    20,621.29x = 28,457.71 × 11,189.85
  4. Step 4: Simplify right side
    20,621.29x = 318,437,506.24
  5. Step 5: Solve for x
    x = 318,437,506.24/20,621.29
  6. Step 6: Final answer
    x = 15,442.17

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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.