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Finding the Fourth Proportional to 28,798.58, 43,203.72 and 12,158.66

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Solution

The fourth proportional to 28,798.58, 43,203.72 and 12,158.66 is: 18,240.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,798.58 : 43,203.72 = 12,158.66 : x
  2. Step 2: Convert to fraction form
    28,798.58/43,203.72 = 12,158.66/x
  3. Step 3: Cross multiply
    28,798.58x = 43,203.72 × 12,158.66
  4. Step 4: Simplify right side
    28,798.58x = 525,299,342.22
  5. Step 5: Solve for x
    x = 525,299,342.22/28,798.58
  6. Step 6: Final answer
    x = 18,240.46

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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.