Home / 30,318.89-45,483.20-12,791.30

Finding the Fourth Proportional to 30,318.89, 45,483.20 and 12,791.30

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Solution

The fourth proportional to 30,318.89, 45,483.20 and 12,791.30 is: 19,189.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,318.89 : 45,483.20 = 12,791.30 : x
  2. Step 2: Convert to fraction form
    30,318.89/45,483.20 = 12,791.30/x
  3. Step 3: Cross multiply
    30,318.89x = 45,483.20 × 12,791.30
  4. Step 4: Simplify right side
    30,318.89x = 581,789,192.20
  5. Step 5: Solve for x
    x = 581,789,192.20/30,318.89
  6. Step 6: Final answer
    x = 19,189.00

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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.