Home / 20,623.50-28,467.81-12,240

Finding the Fourth Proportional to 20,623.50, 28,467.81 and 12,240

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Solution

The fourth proportional to 20,623.50, 28,467.81 and 12,240 is: 16,895.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.50 : 28,467.81 = 12,240 : x
  2. Step 2: Convert to fraction form
    20,623.50/28,467.81 = 12,240/x
  3. Step 3: Cross multiply
    20,623.50x = 28,467.81 × 12,240
  4. Step 4: Simplify right side
    20,623.50x = 348,445,994.40
  5. Step 5: Solve for x
    x = 348,445,994.40/20,623.50
  6. Step 6: Final answer
    x = 16,895.58

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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.