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Finding the Fourth Proportional to 7,907.68, 11,921.56 and 7,484.32

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Solution

The fourth proportional to 7,907.68, 11,921.56 and 7,484.32 is: 11,283.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,907.68 : 11,921.56 = 7,484.32 : x
  2. Step 2: Convert to fraction form
    7,907.68/11,921.56 = 7,484.32/x
  3. Step 3: Cross multiply
    7,907.68x = 11,921.56 × 7,484.32
  4. Step 4: Simplify right side
    7,907.68x = 89,224,769.94
  5. Step 5: Solve for x
    x = 89,224,769.94/7,907.68
  6. Step 6: Final answer
    x = 11,283.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.