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Finding the Fourth Proportional to 28,977.40, 43,368.90 and 25,478.20

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Solution

The fourth proportional to 28,977.40, 43,368.90 and 25,478.20 is: 38,131.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,977.40 : 43,368.90 = 25,478.20 : x
  2. Step 2: Convert to fraction form
    28,977.40/43,368.90 = 25,478.20/x
  3. Step 3: Cross multiply
    28,977.40x = 43,368.90 × 25,478.20
  4. Step 4: Simplify right side
    28,977.40x = 1,104,961,507.98
  5. Step 5: Solve for x
    x = 1,104,961,507.98/28,977.40
  6. Step 6: Final answer
    x = 38,131.84

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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.