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Finding the Fourth Proportional to 18,816.64, 28,294.08 and 18,056.32

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Solution

The fourth proportional to 18,816.64, 28,294.08 and 18,056.32 is: 27,150.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.64 : 28,294.08 = 18,056.32 : x
  2. Step 2: Convert to fraction form
    18,816.64/28,294.08 = 18,056.32/x
  3. Step 3: Cross multiply
    18,816.64x = 28,294.08 × 18,056.32
  4. Step 4: Simplify right side
    18,816.64x = 510,886,962.59
  5. Step 5: Solve for x
    x = 510,886,962.59/18,816.64
  6. Step 6: Final answer
    x = 27,150.81

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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.