Home / 7,916.81-11,880.41-4,221.72

Finding the Fourth Proportional to 7,916.81, 11,880.41 and 4,221.72

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Solution

The fourth proportional to 7,916.81, 11,880.41 and 4,221.72 is: 6,335.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,916.81 : 11,880.41 = 4,221.72 : x
  2. Step 2: Convert to fraction form
    7,916.81/11,880.41 = 4,221.72/x
  3. Step 3: Cross multiply
    7,916.81x = 11,880.41 × 4,221.72
  4. Step 4: Simplify right side
    7,916.81x = 50,155,743.40
  5. Step 5: Solve for x
    x = 50,155,743.40/7,916.81
  6. Step 6: Final answer
    x = 6,335.35

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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.