Home / 20,712.15-28,583.93-12,219.27

Finding the Fourth Proportional to 20,712.15, 28,583.93 and 12,219.27

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Solution

The fourth proportional to 20,712.15, 28,583.93 and 12,219.27 is: 16,863.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.15 : 28,583.93 = 12,219.27 : x
  2. Step 2: Convert to fraction form
    20,712.15/28,583.93 = 12,219.27/x
  3. Step 3: Cross multiply
    20,712.15x = 28,583.93 × 12,219.27
  4. Step 4: Simplify right side
    20,712.15x = 349,274,697.23
  5. Step 5: Solve for x
    x = 349,274,697.23/20,712.15
  6. Step 6: Final answer
    x = 16,863.28

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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.