Home / 10,731.80-16,116.90-7,813.40

Finding the Fourth Proportional to 10,731.80, 16,116.90 and 7,813.40

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Solution

The fourth proportional to 10,731.80, 16,116.90 and 7,813.40 is: 11,734.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,731.80 : 16,116.90 = 7,813.40 : x
  2. Step 2: Convert to fraction form
    10,731.80/16,116.90 = 7,813.40/x
  3. Step 3: Cross multiply
    10,731.80x = 16,116.90 × 7,813.40
  4. Step 4: Simplify right side
    10,731.80x = 125,927,786.46
  5. Step 5: Solve for x
    x = 125,927,786.46/10,731.80
  6. Step 6: Final answer
    x = 11,734.08

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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.