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Finding the Fourth Proportional to 28,362.78, 42,538.86 and 8,368.02

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Solution

The fourth proportional to 28,362.78, 42,538.86 and 8,368.02 is: 12,550.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.78 : 42,538.86 = 8,368.02 : x
  2. Step 2: Convert to fraction form
    28,362.78/42,538.86 = 8,368.02/x
  3. Step 3: Cross multiply
    28,362.78x = 42,538.86 × 8,368.02
  4. Step 4: Simplify right side
    28,362.78x = 355,966,031.26
  5. Step 5: Solve for x
    x = 355,966,031.26/28,362.78
  6. Step 6: Final answer
    x = 12,550.46

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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.