Home / 10,916.10-16,390.35-7,643.70

Finding the Fourth Proportional to 10,916.10, 16,390.35 and 7,643.70

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Solution

The fourth proportional to 10,916.10, 16,390.35 and 7,643.70 is: 11,476.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,916.10 : 16,390.35 = 7,643.70 : x
  2. Step 2: Convert to fraction form
    10,916.10/16,390.35 = 7,643.70/x
  3. Step 3: Cross multiply
    10,916.10x = 16,390.35 × 7,643.70
  4. Step 4: Simplify right side
    10,916.10x = 125,282,918.30
  5. Step 5: Solve for x
    x = 125,282,918.30/10,916.10
  6. Step 6: Final answer
    x = 11,476.89

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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.