Home / 7,980.31-11,001.99-6,485.86

Finding the Fourth Proportional to 7,980.31, 11,001.99 and 6,485.86

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Solution

The fourth proportional to 7,980.31, 11,001.99 and 6,485.86 is: 8,941.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.31 : 11,001.99 = 6,485.86 : x
  2. Step 2: Convert to fraction form
    7,980.31/11,001.99 = 6,485.86/x
  3. Step 3: Cross multiply
    7,980.31x = 11,001.99 × 6,485.86
  4. Step 4: Simplify right side
    7,980.31x = 71,357,366.86
  5. Step 5: Solve for x
    x = 71,357,366.86/7,980.31
  6. Step 6: Final answer
    x = 8,941.68

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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.