Home / 15,685.45-21,635.00-13,311.24

Finding the Fourth Proportional to 15,685.45, 21,635.00 and 13,311.24

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Solution

The fourth proportional to 15,685.45, 21,635.00 and 13,311.24 is: 18,360.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.45 : 21,635.00 = 13,311.24 : x
  2. Step 2: Convert to fraction form
    15,685.45/21,635.00 = 13,311.24/x
  3. Step 3: Cross multiply
    15,685.45x = 21,635.00 × 13,311.24
  4. Step 4: Simplify right side
    15,685.45x = 287,988,579.63
  5. Step 5: Solve for x
    x = 287,988,579.63/15,685.45
  6. Step 6: Final answer
    x = 18,360.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.