Home / 28,438.40-42,596.04-20,630

Finding the Fourth Proportional to 28,438.40, 42,596.04 and 20,630

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Solution

The fourth proportional to 28,438.40, 42,596.04 and 20,630 is: 30,900.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.40 : 42,596.04 = 20,630 : x
  2. Step 2: Convert to fraction form
    28,438.40/42,596.04 = 20,630/x
  3. Step 3: Cross multiply
    28,438.40x = 42,596.04 × 20,630
  4. Step 4: Simplify right side
    28,438.40x = 878,756,305.20
  5. Step 5: Solve for x
    x = 878,756,305.20/28,438.40
  6. Step 6: Final answer
    x = 30,900.34

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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.