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Finding the Fourth Proportional to 28,443.60, 42,670.44 and 9,719.26

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Solution

The fourth proportional to 28,443.60, 42,670.44 and 9,719.26 is: 14,580.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,443.60 : 42,670.44 = 9,719.26 : x
  2. Step 2: Convert to fraction form
    28,443.60/42,670.44 = 9,719.26/x
  3. Step 3: Cross multiply
    28,443.60x = 42,670.44 × 9,719.26
  4. Step 4: Simplify right side
    28,443.60x = 414,725,100.67
  5. Step 5: Solve for x
    x = 414,725,100.67/28,443.60
  6. Step 6: Final answer
    x = 14,580.61

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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.