Home / 30,319.53-45,485.60-12,789.51

Finding the Fourth Proportional to 30,319.53, 45,485.60 and 12,789.51

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Solution

The fourth proportional to 30,319.53, 45,485.60 and 12,789.51 is: 19,186.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,319.53 : 45,485.60 = 12,789.51 : x
  2. Step 2: Convert to fraction form
    30,319.53/45,485.60 = 12,789.51/x
  3. Step 3: Cross multiply
    30,319.53x = 45,485.60 × 12,789.51
  4. Step 4: Simplify right side
    30,319.53x = 581,738,472.11
  5. Step 5: Solve for x
    x = 581,738,472.11/30,319.53
  6. Step 6: Final answer
    x = 19,186.92

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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.