Home / 18,405.12-25,395.48-12,731.04

Finding the Fourth Proportional to 18,405.12, 25,395.48 and 12,731.04

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Solution

The fourth proportional to 18,405.12, 25,395.48 and 12,731.04 is: 17,566.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.12 : 25,395.48 = 12,731.04 : x
  2. Step 2: Convert to fraction form
    18,405.12/25,395.48 = 12,731.04/x
  3. Step 3: Cross multiply
    18,405.12x = 25,395.48 × 12,731.04
  4. Step 4: Simplify right side
    18,405.12x = 323,310,871.70
  5. Step 5: Solve for x
    x = 323,310,871.70/18,405.12
  6. Step 6: Final answer
    x = 17,566.35

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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.