Home / 18,686.72-28,051.20-12,801.28

Finding the Fourth Proportional to 18,686.72, 28,051.20 and 12,801.28

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Solution

The fourth proportional to 18,686.72, 28,051.20 and 12,801.28 is: 19,216.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.72 : 28,051.20 = 12,801.28 : x
  2. Step 2: Convert to fraction form
    18,686.72/28,051.20 = 12,801.28/x
  3. Step 3: Cross multiply
    18,686.72x = 28,051.20 × 12,801.28
  4. Step 4: Simplify right side
    18,686.72x = 359,091,265.54
  5. Step 5: Solve for x
    x = 359,091,265.54/18,686.72
  6. Step 6: Final answer
    x = 19,216.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.