Home / 12,928.26-19,400.88-7,089

Finding the Fourth Proportional to 12,928.26, 19,400.88 and 7,089

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Solution

The fourth proportional to 12,928.26, 19,400.88 and 7,089 is: 10,638.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.26 : 19,400.88 = 7,089 : x
  2. Step 2: Convert to fraction form
    12,928.26/19,400.88 = 7,089/x
  3. Step 3: Cross multiply
    12,928.26x = 19,400.88 × 7,089
  4. Step 4: Simplify right side
    12,928.26x = 137,532,838.32
  5. Step 5: Solve for x
    x = 137,532,838.32/12,928.26
  6. Step 6: Final answer
    x = 10,638.16

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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.