Home / 11,970.72-17,988.48-6,428.16

Finding the Fourth Proportional to 11,970.72, 17,988.48 and 6,428.16

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Solution

The fourth proportional to 11,970.72, 17,988.48 and 6,428.16 is: 9,659.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,970.72 : 17,988.48 = 6,428.16 : x
  2. Step 2: Convert to fraction form
    11,970.72/17,988.48 = 6,428.16/x
  3. Step 3: Cross multiply
    11,970.72x = 17,988.48 × 6,428.16
  4. Step 4: Simplify right side
    11,970.72x = 115,632,827.60
  5. Step 5: Solve for x
    x = 115,632,827.60/11,970.72
  6. Step 6: Final answer
    x = 9,659.64

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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.