Home / 30,319.88-45,485.96-12,789.76

Finding the Fourth Proportional to 30,319.88, 45,485.96 and 12,789.76

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Solution

The fourth proportional to 30,319.88, 45,485.96 and 12,789.76 is: 19,187.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,319.88 : 45,485.96 = 12,789.76 : x
  2. Step 2: Convert to fraction form
    30,319.88/45,485.96 = 12,789.76/x
  3. Step 3: Cross multiply
    30,319.88x = 45,485.96 × 12,789.76
  4. Step 4: Simplify right side
    30,319.88x = 581,754,511.77
  5. Step 5: Solve for x
    x = 581,754,511.77/30,319.88
  6. Step 6: Final answer
    x = 19,187.23

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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.