Home / 20,572.43-28,389.38-12,188.93

Finding the Fourth Proportional to 20,572.43, 28,389.38 and 12,188.93

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Solution

The fourth proportional to 20,572.43, 28,389.38 and 12,188.93 is: 16,820.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.43 : 28,389.38 = 12,188.93 : x
  2. Step 2: Convert to fraction form
    20,572.43/28,389.38 = 12,188.93/x
  3. Step 3: Cross multiply
    20,572.43x = 28,389.38 × 12,188.93
  4. Step 4: Simplify right side
    20,572.43x = 346,036,175.59
  5. Step 5: Solve for x
    x = 346,036,175.59/20,572.43
  6. Step 6: Final answer
    x = 16,820.38

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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.