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Finding the Fourth Proportional to 28,539.70, 42,809.55 and 25,477.90

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Solution

The fourth proportional to 28,539.70, 42,809.55 and 25,477.90 is: 38,216.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,539.70 : 42,809.55 = 25,477.90 : x
  2. Step 2: Convert to fraction form
    28,539.70/42,809.55 = 25,477.90/x
  3. Step 3: Cross multiply
    28,539.70x = 42,809.55 × 25,477.90
  4. Step 4: Simplify right side
    28,539.70x = 1,090,697,433.95
  5. Step 5: Solve for x
    x = 1,090,697,433.95/28,539.70
  6. Step 6: Final answer
    x = 38,216.85

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1.5x scale

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.