Home / 11,590.40-15,999.36-7,404.80

Finding the Fourth Proportional to 11,590.40, 15,999.36 and 7,404.80

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Solution

The fourth proportional to 11,590.40, 15,999.36 and 7,404.80 is: 10,221.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,590.40 : 15,999.36 = 7,404.80 : x
  2. Step 2: Convert to fraction form
    11,590.40/15,999.36 = 7,404.80/x
  3. Step 3: Cross multiply
    11,590.40x = 15,999.36 × 7,404.80
  4. Step 4: Simplify right side
    11,590.40x = 118,472,060.93
  5. Step 5: Solve for x
    x = 118,472,060.93/11,590.40
  6. Step 6: Final answer
    x = 10,221.57

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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.