Home / 39,138.12-58,709.04-12,486.93

Finding the Fourth Proportional to 39,138.12, 58,709.04 and 12,486.93

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Solution

The fourth proportional to 39,138.12, 58,709.04 and 12,486.93 is: 18,730.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138.12 : 58,709.04 = 12,486.93 : x
  2. Step 2: Convert to fraction form
    39,138.12/58,709.04 = 12,486.93/x
  3. Step 3: Cross multiply
    39,138.12x = 58,709.04 × 12,486.93
  4. Step 4: Simplify right side
    39,138.12x = 733,095,672.85
  5. Step 5: Solve for x
    x = 733,095,672.85/39,138.12
  6. Step 6: Final answer
    x = 18,730.99

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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.