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Finding the Fourth Proportional to 13,772.16, 19,000.32 and 8,465.28

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Solution

The fourth proportional to 13,772.16, 19,000.32 and 8,465.28 is: 11,678.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,772.16 : 19,000.32 = 8,465.28 : x
  2. Step 2: Convert to fraction form
    13,772.16/19,000.32 = 8,465.28/x
  3. Step 3: Cross multiply
    13,772.16x = 19,000.32 × 8,465.28
  4. Step 4: Simplify right side
    13,772.16x = 160,843,028.89
  5. Step 5: Solve for x
    x = 160,843,028.89/13,772.16
  6. Step 6: Final answer
    x = 11,678.85

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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.