Home / 28,356.63-42,520.35-12,765.75

Finding the Fourth Proportional to 28,356.63, 42,520.35 and 12,765.75

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Solution

The fourth proportional to 28,356.63, 42,520.35 and 12,765.75 is: 19,142.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.63 : 42,520.35 = 12,765.75 : x
  2. Step 2: Convert to fraction form
    28,356.63/42,520.35 = 12,765.75/x
  3. Step 3: Cross multiply
    28,356.63x = 42,520.35 × 12,765.75
  4. Step 4: Simplify right side
    28,356.63x = 542,804,158.01
  5. Step 5: Solve for x
    x = 542,804,158.01/28,356.63
  6. Step 6: Final answer
    x = 19,142.05

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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.