Home / 7,916.72-11,870.67-3,240

Finding the Fourth Proportional to 7,916.72, 11,870.67 and 3,240

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Solution

The fourth proportional to 7,916.72, 11,870.67 and 3,240 is: 4,858.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,916.72 : 11,870.67 = 3,240 : x
  2. Step 2: Convert to fraction form
    7,916.72/11,870.67 = 3,240/x
  3. Step 3: Cross multiply
    7,916.72x = 11,870.67 × 3,240
  4. Step 4: Simplify right side
    7,916.72x = 38,460,970.80
  5. Step 5: Solve for x
    x = 38,460,970.80/7,916.72
  6. Step 6: Final answer
    x = 4,858.20

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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.