Home / 20,428.52-28,189.16-11,477.02

Finding the Fourth Proportional to 20,428.52, 28,189.16 and 11,477.02

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Solution

The fourth proportional to 20,428.52, 28,189.16 and 11,477.02 is: 15,837.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.52 : 28,189.16 = 11,477.02 : x
  2. Step 2: Convert to fraction form
    20,428.52/28,189.16 = 11,477.02/x
  3. Step 3: Cross multiply
    20,428.52x = 28,189.16 × 11,477.02
  4. Step 4: Simplify right side
    20,428.52x = 323,527,354.77
  5. Step 5: Solve for x
    x = 323,527,354.77/20,428.52
  6. Step 6: Final answer
    x = 15,837.04

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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.