Home / 12,420.21-18,632.93-3,654.39

Finding the Fourth Proportional to 12,420.21, 18,632.93 and 3,654.39

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Solution

The fourth proportional to 12,420.21, 18,632.93 and 3,654.39 is: 5,482.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.21 : 18,632.93 = 3,654.39 : x
  2. Step 2: Convert to fraction form
    12,420.21/18,632.93 = 3,654.39/x
  3. Step 3: Cross multiply
    12,420.21x = 18,632.93 × 3,654.39
  4. Step 4: Simplify right side
    12,420.21x = 68,091,993.06
  5. Step 5: Solve for x
    x = 68,091,993.06/12,420.21
  6. Step 6: Final answer
    x = 5,482.35

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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.