Home / 12,480.14-18,720.93-4,689.02

Finding the Fourth Proportional to 12,480.14, 18,720.93 and 4,689.02

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Solution

The fourth proportional to 12,480.14, 18,720.93 and 4,689.02 is: 7,033.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.14 : 18,720.93 = 4,689.02 : x
  2. Step 2: Convert to fraction form
    12,480.14/18,720.93 = 4,689.02/x
  3. Step 3: Cross multiply
    12,480.14x = 18,720.93 × 4,689.02
  4. Step 4: Simplify right side
    12,480.14x = 87,782,815.19
  5. Step 5: Solve for x
    x = 87,782,815.19/12,480.14
  6. Step 6: Final answer
    x = 7,033.80

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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.