Home / 11,128.16-16,705.20-7,248.80

Finding the Fourth Proportional to 11,128.16, 16,705.20 and 7,248.80

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Solution

The fourth proportional to 11,128.16, 16,705.20 and 7,248.80 is: 10,881.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.16 : 16,705.20 = 7,248.80 : x
  2. Step 2: Convert to fraction form
    11,128.16/16,705.20 = 7,248.80/x
  3. Step 3: Cross multiply
    11,128.16x = 16,705.20 × 7,248.80
  4. Step 4: Simplify right side
    11,128.16x = 121,092,653.76
  5. Step 5: Solve for x
    x = 121,092,653.76/11,128.16
  6. Step 6: Final answer
    x = 10,881.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.