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Finding the Fourth Proportional to 28,409.51, 42,619.05 and 8,683.45

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Solution

The fourth proportional to 28,409.51, 42,619.05 and 8,683.45 is: 13,026.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.51 : 42,619.05 = 8,683.45 : x
  2. Step 2: Convert to fraction form
    28,409.51/42,619.05 = 8,683.45/x
  3. Step 3: Cross multiply
    28,409.51x = 42,619.05 × 8,683.45
  4. Step 4: Simplify right side
    28,409.51x = 370,080,510.70
  5. Step 5: Solve for x
    x = 370,080,510.70/28,409.51
  6. Step 6: Final answer
    x = 13,026.64

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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.