Home / 13,981.64-20,976.10-5,216.63

Finding the Fourth Proportional to 13,981.64, 20,976.10 and 5,216.63

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Solution

The fourth proportional to 13,981.64, 20,976.10 and 5,216.63 is: 7,826.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.64 : 20,976.10 = 5,216.63 : x
  2. Step 2: Convert to fraction form
    13,981.64/20,976.10 = 5,216.63/x
  3. Step 3: Cross multiply
    13,981.64x = 20,976.10 × 5,216.63
  4. Step 4: Simplify right side
    13,981.64x = 109,424,434.62
  5. Step 5: Solve for x
    x = 109,424,434.62/13,981.64
  6. Step 6: Final answer
    x = 7,826.30

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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.