Home / 14,078.10-21,120.51-4,718.15

Finding the Fourth Proportional to 14,078.10, 21,120.51 and 4,718.15

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Solution

The fourth proportional to 14,078.10, 21,120.51 and 4,718.15 is: 7,078.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,078.10 : 21,120.51 = 4,718.15 : x
  2. Step 2: Convert to fraction form
    14,078.10/21,120.51 = 4,718.15/x
  3. Step 3: Cross multiply
    14,078.10x = 21,120.51 × 4,718.15
  4. Step 4: Simplify right side
    14,078.10x = 99,649,725.55
  5. Step 5: Solve for x
    x = 99,649,725.55/14,078.10
  6. Step 6: Final answer
    x = 7,078.35

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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.