Home / 12,280.80-18,421.20-4,884.78

Finding the Fourth Proportional to 12,280.80, 18,421.20 and 4,884.78

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Solution

The fourth proportional to 12,280.80, 18,421.20 and 4,884.78 is: 7,327.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,280.80 : 18,421.20 = 4,884.78 : x
  2. Step 2: Convert to fraction form
    12,280.80/18,421.20 = 4,884.78/x
  3. Step 3: Cross multiply
    12,280.80x = 18,421.20 × 4,884.78
  4. Step 4: Simplify right side
    12,280.80x = 89,983,509.34
  5. Step 5: Solve for x
    x = 89,983,509.34/12,280.80
  6. Step 6: Final answer
    x = 7,327.17

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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.