Home / 13,320.77-19,981.16-3,960.75

Finding the Fourth Proportional to 13,320.77, 19,981.16 and 3,960.75

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Solution

The fourth proportional to 13,320.77, 19,981.16 and 3,960.75 is: 5,941.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.77 : 19,981.16 = 3,960.75 : x
  2. Step 2: Convert to fraction form
    13,320.77/19,981.16 = 3,960.75/x
  3. Step 3: Cross multiply
    13,320.77x = 19,981.16 × 3,960.75
  4. Step 4: Simplify right side
    13,320.77x = 79,140,359.67
  5. Step 5: Solve for x
    x = 79,140,359.67/13,320.77
  6. Step 6: Final answer
    x = 5,941.12

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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.