Home / 7,131.18-9,840.93-3,987.36

Finding the Fourth Proportional to 7,131.18, 9,840.93 and 3,987.36

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Solution

The fourth proportional to 7,131.18, 9,840.93 and 3,987.36 is: 5,502.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.18 : 9,840.93 = 3,987.36 : x
  2. Step 2: Convert to fraction form
    7,131.18/9,840.93 = 3,987.36/x
  3. Step 3: Cross multiply
    7,131.18x = 9,840.93 × 3,987.36
  4. Step 4: Simplify right side
    7,131.18x = 39,239,330.64
  5. Step 5: Solve for x
    x = 39,239,330.64/7,131.18
  6. Step 6: Final answer
    x = 5,502.50

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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.