Home / 18,784.64-28,179.70-5,638.05

Finding the Fourth Proportional to 18,784.64, 28,179.70 and 5,638.05

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Solution

The fourth proportional to 18,784.64, 28,179.70 and 5,638.05 is: 8,457.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,784.64 : 28,179.70 = 5,638.05 : x
  2. Step 2: Convert to fraction form
    18,784.64/28,179.70 = 5,638.05/x
  3. Step 3: Cross multiply
    18,784.64x = 28,179.70 × 5,638.05
  4. Step 4: Simplify right side
    18,784.64x = 158,878,557.59
  5. Step 5: Solve for x
    x = 158,878,557.59/18,784.64
  6. Step 6: Final answer
    x = 8,457.90

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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.