Home / 15,815.56-21,800.34-12,453.04

Finding the Fourth Proportional to 15,815.56, 21,800.34 and 12,453.04

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Solution

The fourth proportional to 15,815.56, 21,800.34 and 12,453.04 is: 17,165.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,815.56 : 21,800.34 = 12,453.04 : x
  2. Step 2: Convert to fraction form
    15,815.56/21,800.34 = 12,453.04/x
  3. Step 3: Cross multiply
    15,815.56x = 21,800.34 × 12,453.04
  4. Step 4: Simplify right side
    15,815.56x = 271,480,506.03
  5. Step 5: Solve for x
    x = 271,480,506.03/15,815.56
  6. Step 6: Final answer
    x = 17,165.41

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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.