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Finding the Fourth Proportional to 30,570.96, 45,860.68 and 28,890.20

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Solution

The fourth proportional to 30,570.96, 45,860.68 and 28,890.20 is: 43,339.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,570.96 : 45,860.68 = 28,890.20 : x
  2. Step 2: Convert to fraction form
    30,570.96/45,860.68 = 28,890.20/x
  3. Step 3: Cross multiply
    30,570.96x = 45,860.68 × 28,890.20
  4. Step 4: Simplify right side
    30,570.96x = 1,324,924,217.34
  5. Step 5: Solve for x
    x = 1,324,924,217.34/30,570.96
  6. Step 6: Final answer
    x = 43,339.31

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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.