Home / 7,140.80-9,852.90-3,996.40

Finding the Fourth Proportional to 7,140.80, 9,852.90 and 3,996.40

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Solution

The fourth proportional to 7,140.80, 9,852.90 and 3,996.40 is: 5,514.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.80 : 9,852.90 = 3,996.40 : x
  2. Step 2: Convert to fraction form
    7,140.80/9,852.90 = 3,996.40/x
  3. Step 3: Cross multiply
    7,140.80x = 9,852.90 × 3,996.40
  4. Step 4: Simplify right side
    7,140.80x = 39,376,129.56
  5. Step 5: Solve for x
    x = 39,376,129.56/7,140.80
  6. Step 6: Final answer
    x = 5,514.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.