Home / 30,320.17-45,486.35-12,789.92

Finding the Fourth Proportional to 30,320.17, 45,486.35 and 12,789.92

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Solution

The fourth proportional to 30,320.17, 45,486.35 and 12,789.92 is: 19,187.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,320.17 : 45,486.35 = 12,789.92 : x
  2. Step 2: Convert to fraction form
    30,320.17/45,486.35 = 12,789.92/x
  3. Step 3: Cross multiply
    30,320.17x = 45,486.35 × 12,789.92
  4. Step 4: Simplify right side
    30,320.17x = 581,766,777.59
  5. Step 5: Solve for x
    x = 581,766,777.59/30,320.17
  6. Step 6: Final answer
    x = 19,187.45

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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.