Home / 12,421.40-18,630.30-3,655.40

Finding the Fourth Proportional to 12,421.40, 18,630.30 and 3,655.40

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Solution

The fourth proportional to 12,421.40, 18,630.30 and 3,655.40 is: 5,482.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.40 : 18,630.30 = 3,655.40 : x
  2. Step 2: Convert to fraction form
    12,421.40/18,630.30 = 3,655.40/x
  3. Step 3: Cross multiply
    12,421.40x = 18,630.30 × 3,655.40
  4. Step 4: Simplify right side
    12,421.40x = 68,101,198.62
  5. Step 5: Solve for x
    x = 68,101,198.62/12,421.40
  6. Step 6: Final answer
    x = 5,482.57

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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.