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Finding the Fourth Proportional to 25,804.80, 38,701.80 and 12,666.60

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Solution

The fourth proportional to 25,804.80, 38,701.80 and 12,666.60 is: 18,997.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,804.80 : 38,701.80 = 12,666.60 : x
  2. Step 2: Convert to fraction form
    25,804.80/38,701.80 = 12,666.60/x
  3. Step 3: Cross multiply
    25,804.80x = 38,701.80 × 12,666.60
  4. Step 4: Simplify right side
    25,804.80x = 490,220,219.88
  5. Step 5: Solve for x
    x = 490,220,219.88/25,804.80
  6. Step 6: Final answer
    x = 18,997.25

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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.