Home / 20,678.63-28,521.23-13,118.44

Finding the Fourth Proportional to 20,678.63, 28,521.23 and 13,118.44

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Solution

The fourth proportional to 20,678.63, 28,521.23 and 13,118.44 is: 18,093.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.63 : 28,521.23 = 13,118.44 : x
  2. Step 2: Convert to fraction form
    20,678.63/28,521.23 = 13,118.44/x
  3. Step 3: Cross multiply
    20,678.63x = 28,521.23 × 13,118.44
  4. Step 4: Simplify right side
    20,678.63x = 374,154,044.48
  5. Step 5: Solve for x
    x = 374,154,044.48/20,678.63
  6. Step 6: Final answer
    x = 18,093.75

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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.