Home / 11,484.18-15,835.70-9,978.80

Finding the Fourth Proportional to 11,484.18, 15,835.70 and 9,978.80

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Solution

The fourth proportional to 11,484.18, 15,835.70 and 9,978.80 is: 13,759.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,484.18 : 15,835.70 = 9,978.80 : x
  2. Step 2: Convert to fraction form
    11,484.18/15,835.70 = 9,978.80/x
  3. Step 3: Cross multiply
    11,484.18x = 15,835.70 × 9,978.80
  4. Step 4: Simplify right side
    11,484.18x = 158,021,228.93
  5. Step 5: Solve for x
    x = 158,021,228.93/11,484.18
  6. Step 6: Final answer
    x = 13,759.91

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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.