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Finding the Fourth Proportional to 19,003.64, 28,490.08 and 7,918.66

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Solution

The fourth proportional to 19,003.64, 28,490.08 and 7,918.66 is: 11,871.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,003.64 : 28,490.08 = 7,918.66 : x
  2. Step 2: Convert to fraction form
    19,003.64/28,490.08 = 7,918.66/x
  3. Step 3: Cross multiply
    19,003.64x = 28,490.08 × 7,918.66
  4. Step 4: Simplify right side
    19,003.64x = 225,603,256.89
  5. Step 5: Solve for x
    x = 225,603,256.89/19,003.64
  6. Step 6: Final answer
    x = 11,871.58

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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.