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Finding the Fourth Proportional to 14,215.76, 19,617 and 7,928.48

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Solution

The fourth proportional to 14,215.76, 19,617 and 7,928.48 is: 10,940.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,215.76 : 19,617 = 7,928.48 : x
  2. Step 2: Convert to fraction form
    14,215.76/19,617 = 7,928.48/x
  3. Step 3: Cross multiply
    14,215.76x = 19,617 × 7,928.48
  4. Step 4: Simplify right side
    14,215.76x = 155,532,992.16
  5. Step 5: Solve for x
    x = 155,532,992.16/14,215.76
  6. Step 6: Final answer
    x = 10,940.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.