Home / 7,085.31-9,777.48-3,898.59

Finding the Fourth Proportional to 7,085.31, 9,777.48 and 3,898.59

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Solution

The fourth proportional to 7,085.31, 9,777.48 and 3,898.59 is: 5,379.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,085.31 : 9,777.48 = 3,898.59 : x
  2. Step 2: Convert to fraction form
    7,085.31/9,777.48 = 3,898.59/x
  3. Step 3: Cross multiply
    7,085.31x = 9,777.48 × 3,898.59
  4. Step 4: Simplify right side
    7,085.31x = 38,118,385.75
  5. Step 5: Solve for x
    x = 38,118,385.75/7,085.31
  6. Step 6: Final answer
    x = 5,379.92

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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.