Home / 19,124.30-28,688.22-7,438.40

Finding the Fourth Proportional to 19,124.30, 28,688.22 and 7,438.40

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Solution

The fourth proportional to 19,124.30, 28,688.22 and 7,438.40 is: 11,158.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,124.30 : 28,688.22 = 7,438.40 : x
  2. Step 2: Convert to fraction form
    19,124.30/28,688.22 = 7,438.40/x
  3. Step 3: Cross multiply
    19,124.30x = 28,688.22 × 7,438.40
  4. Step 4: Simplify right side
    19,124.30x = 213,394,455.65
  5. Step 5: Solve for x
    x = 213,394,455.65/19,124.30
  6. Step 6: Final answer
    x = 11,158.29

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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.