Home / 20,450.39-28,232.69-12,385.40

Finding the Fourth Proportional to 20,450.39, 28,232.69 and 12,385.40

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Solution

The fourth proportional to 20,450.39, 28,232.69 and 12,385.40 is: 17,098.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,450.39 : 28,232.69 = 12,385.40 : x
  2. Step 2: Convert to fraction form
    20,450.39/28,232.69 = 12,385.40/x
  3. Step 3: Cross multiply
    20,450.39x = 28,232.69 × 12,385.40
  4. Step 4: Simplify right side
    20,450.39x = 349,672,955.64
  5. Step 5: Solve for x
    x = 349,672,955.64/20,450.39
  6. Step 6: Final answer
    x = 17,098.60

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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.