Home / 20,623.22-28,438.53-12,238.10

Finding the Fourth Proportional to 20,623.22, 28,438.53 and 12,238.10

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Solution

The fourth proportional to 20,623.22, 28,438.53 and 12,238.10 is: 16,875.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.22 : 28,438.53 = 12,238.10 : x
  2. Step 2: Convert to fraction form
    20,623.22/28,438.53 = 12,238.10/x
  3. Step 3: Cross multiply
    20,623.22x = 28,438.53 × 12,238.10
  4. Step 4: Simplify right side
    20,623.22x = 348,033,573.99
  5. Step 5: Solve for x
    x = 348,033,573.99/20,623.22
  6. Step 6: Final answer
    x = 16,875.81

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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.