Home / 28,749.12-43,152.72-20,438.52

Finding the Fourth Proportional to 28,749.12, 43,152.72 and 20,438.52

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Solution

The fourth proportional to 28,749.12, 43,152.72 and 20,438.52 is: 30,678.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,749.12 : 43,152.72 = 20,438.52 : x
  2. Step 2: Convert to fraction form
    28,749.12/43,152.72 = 20,438.52/x
  3. Step 3: Cross multiply
    28,749.12x = 43,152.72 × 20,438.52
  4. Step 4: Simplify right side
    28,749.12x = 881,977,730.77
  5. Step 5: Solve for x
    x = 881,977,730.77/28,749.12
  6. Step 6: Final answer
    x = 30,678.43

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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.