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Finding the Fourth Proportional to 11,907.15, 17,888.27 and 7,478.61

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Solution

The fourth proportional to 11,907.15, 17,888.27 and 7,478.61 is: 11,235.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,907.15 : 17,888.27 = 7,478.61 : x
  2. Step 2: Convert to fraction form
    11,907.15/17,888.27 = 7,478.61/x
  3. Step 3: Cross multiply
    11,907.15x = 17,888.27 × 7,478.61
  4. Step 4: Simplify right side
    11,907.15x = 133,779,357.51
  5. Step 5: Solve for x
    x = 133,779,357.51/11,907.15
  6. Step 6: Final answer
    x = 11,235.21

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1.5x scale

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.