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Finding the Fourth Proportional to 28,941.40, 43,387.80 and 15,090.40

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Solution

The fourth proportional to 28,941.40, 43,387.80 and 15,090.40 is: 22,622.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,941.40 : 43,387.80 = 15,090.40 : x
  2. Step 2: Convert to fraction form
    28,941.40/43,387.80 = 15,090.40/x
  3. Step 3: Cross multiply
    28,941.40x = 43,387.80 × 15,090.40
  4. Step 4: Simplify right side
    28,941.40x = 654,739,257.12
  5. Step 5: Solve for x
    x = 654,739,257.12/28,941.40
  6. Step 6: Final answer
    x = 22,622.93

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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.