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Finding the Fourth Proportional to 30,630.40, 45,921.30 and 16,779.40

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Solution

The fourth proportional to 30,630.40, 45,921.30 and 16,779.40 is: 25,155.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,630.40 : 45,921.30 = 16,779.40 : x
  2. Step 2: Convert to fraction form
    30,630.40/45,921.30 = 16,779.40/x
  3. Step 3: Cross multiply
    30,630.40x = 45,921.30 × 16,779.40
  4. Step 4: Simplify right side
    30,630.40x = 770,531,861.22
  5. Step 5: Solve for x
    x = 770,531,861.22/30,630.40
  6. Step 6: Final answer
    x = 25,155.79

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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.