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Finding the Fourth Proportional to 18,457.50, 27,690.60 and 6,145.50

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Solution

The fourth proportional to 18,457.50, 27,690.60 and 6,145.50 is: 9,219.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,457.50 : 27,690.60 = 6,145.50 : x
  2. Step 2: Convert to fraction form
    18,457.50/27,690.60 = 6,145.50/x
  3. Step 3: Cross multiply
    18,457.50x = 27,690.60 × 6,145.50
  4. Step 4: Simplify right side
    18,457.50x = 170,172,582.30
  5. Step 5: Solve for x
    x = 170,172,582.30/18,457.50
  6. Step 6: Final answer
    x = 9,219.70

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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.