Home / 20,430.64-30,638.08-12,112.92

Finding the Fourth Proportional to 20,430.64, 30,638.08 and 12,112.92

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Solution

The fourth proportional to 20,430.64, 30,638.08 and 12,112.92 is: 18,164.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.64 : 30,638.08 = 12,112.92 : x
  2. Step 2: Convert to fraction form
    20,430.64/30,638.08 = 12,112.92/x
  3. Step 3: Cross multiply
    20,430.64x = 30,638.08 × 12,112.92
  4. Step 4: Simplify right side
    20,430.64x = 371,116,611.99
  5. Step 5: Solve for x
    x = 371,116,611.99/20,430.64
  6. Step 6: Final answer
    x = 18,164.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.