Home / 39,129.75-58,698.77-12,477.78

Finding the Fourth Proportional to 39,129.75, 58,698.77 and 12,477.78

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Solution

The fourth proportional to 39,129.75, 58,698.77 and 12,477.78 is: 18,717.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,129.75 : 58,698.77 = 12,477.78 : x
  2. Step 2: Convert to fraction form
    39,129.75/58,698.77 = 12,477.78/x
  3. Step 3: Cross multiply
    39,129.75x = 58,698.77 × 12,477.78
  4. Step 4: Simplify right side
    39,129.75x = 732,430,275.94
  5. Step 5: Solve for x
    x = 732,430,275.94/39,129.75
  6. Step 6: Final answer
    x = 18,717.99

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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.