Home / 13,215.21-19,809.38-8,288.28

Finding the Fourth Proportional to 13,215.21, 19,809.38 and 8,288.28

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Solution

The fourth proportional to 13,215.21, 19,809.38 and 8,288.28 is: 12,423.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.21 : 19,809.38 = 8,288.28 : x
  2. Step 2: Convert to fraction form
    13,215.21/19,809.38 = 8,288.28/x
  3. Step 3: Cross multiply
    13,215.21x = 19,809.38 × 8,288.28
  4. Step 4: Simplify right side
    13,215.21x = 164,185,646.63
  5. Step 5: Solve for x
    x = 164,185,646.63/13,215.21
  6. Step 6: Final answer
    x = 12,423.99

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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.