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Finding the Fourth Proportional to 28,460.80, 42,655.20 and 10,907.20

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Solution

The fourth proportional to 28,460.80, 42,655.20 and 10,907.20 is: 16,347.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,460.80 : 42,655.20 = 10,907.20 : x
  2. Step 2: Convert to fraction form
    28,460.80/42,655.20 = 10,907.20/x
  3. Step 3: Cross multiply
    28,460.80x = 42,655.20 × 10,907.20
  4. Step 4: Simplify right side
    28,460.80x = 465,248,797.44
  5. Step 5: Solve for x
    x = 465,248,797.44/28,460.80
  6. Step 6: Final answer
    x = 16,347.00

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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.