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Finding the Fourth Proportional to 18,783.60, 25,927.88 and 11,619

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Solution

The fourth proportional to 18,783.60, 25,927.88 and 11,619 is: 16,038.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.60 : 25,927.88 = 11,619 : x
  2. Step 2: Convert to fraction form
    18,783.60/25,927.88 = 11,619/x
  3. Step 3: Cross multiply
    18,783.60x = 25,927.88 × 11,619
  4. Step 4: Simplify right side
    18,783.60x = 301,256,037.72
  5. Step 5: Solve for x
    x = 301,256,037.72/18,783.60
  6. Step 6: Final answer
    x = 16,038.25

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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.