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Finding the Fourth Proportional to 18,783.63, 25,919.60 and 11,228.45

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Solution

The fourth proportional to 18,783.63, 25,919.60 and 11,228.45 is: 15,494.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.63 : 25,919.60 = 11,228.45 : x
  2. Step 2: Convert to fraction form
    18,783.63/25,919.60 = 11,228.45/x
  3. Step 3: Cross multiply
    18,783.63x = 25,919.60 × 11,228.45
  4. Step 4: Simplify right side
    18,783.63x = 291,036,746.88
  5. Step 5: Solve for x
    x = 291,036,746.88/18,783.63
  6. Step 6: Final answer
    x = 15,494.17

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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.