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Finding the Fourth Proportional to 7,911.76, 10,918.44 and 4,326.88

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Solution

The fourth proportional to 7,911.76, 10,918.44 and 4,326.88 is: 5,971.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.76 : 10,918.44 = 4,326.88 : x
  2. Step 2: Convert to fraction form
    7,911.76/10,918.44 = 4,326.88/x
  3. Step 3: Cross multiply
    7,911.76x = 10,918.44 × 4,326.88
  4. Step 4: Simplify right side
    7,911.76x = 47,242,779.67
  5. Step 5: Solve for x
    x = 47,242,779.67/7,911.76
  6. Step 6: Final answer
    x = 5,971.21

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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.